Create fewer local v8::TryCatch objects in generated bindings code

Source/bindings/tests/results/V8TestObject.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file has been auto-generated by code_generator_v8.py. DO NOT MODIFY!
 
 #include "config.h"
 #include "V8TestObject.h"
 
 #include "HTMLNames.h"
@@ skipping 4740 matching lines @@
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodDateArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodDateArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(double, dateArg, toCoreDate(info[0]));
+    double dateArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(dateArg, toCoreDate(info[0]));
+    }
     impl->voidMethodDateArg(dateArg);
 }
 
 static void voidMethodDateArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodDateArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodStringArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodStringArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TOSTRING_VOID(V8StringResource<>, stringArg, info[0]);
+    V8StringResource<> stringArg;
+    {
+        v8::TryCatch block;
+        TOSTRING_VOID_NO_DECL(stringArg, info[0]);
+    }
     impl->voidMethodStringArg(stringArg);
 }
 
 static void voidMethodStringArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodStringArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodDOMTimeStampArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "voidMethodDOMTimeStampArg", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID_EXCEPTIONSTATE(unsigned long long, domTimeStampArg, toUInt64(info[0], exceptionState), exceptionState);
+    unsigned long long domTimeStampArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(domTimeStampArg, toUInt64(info[0], exceptionState), exceptionState);
+    }
     impl->voidMethodDOMTimeStampArg(domTimeStampArg);
 }
 
 static void voidMethodDOMTimeStampArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodDOMTimeStampArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodBooleanArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodBooleanArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(bool, booleanArg, info[0]->BooleanValue());
+    bool booleanArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(booleanArg, info[0]->BooleanValue());
+    }
     impl->voidMethodBooleanArg(booleanArg);
 }
 
 static void voidMethodBooleanArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodBooleanArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodByteArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "voidMethodByteArg", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID_EXCEPTIONSTATE(int, byteArg, toInt8(info[0], exceptionState), exceptionState);
+    int byteArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(byteArg, toInt8(info[0], exceptionState), exceptionState);
+    }
     impl->voidMethodByteArg(byteArg);
 }
 
 static void voidMethodByteArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodByteArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodDoubleArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodDoubleArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(double, doubleArg, static_cast<double>(info[0]->NumberValue()));
+    double doubleArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(doubleArg, static_cast<double>(info[0]->NumberValue()));
+    }
     impl->voidMethodDoubleArg(doubleArg);
 }
 
 static void voidMethodDoubleArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodDoubleArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodFloatArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodFloatArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(float, floatArg, static_cast<float>(info[0]->NumberValue()));
+    float floatArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(floatArg, static_cast<float>(info[0]->NumberValue()));
+    }
     impl->voidMethodFloatArg(floatArg);
 }
 
 static void voidMethodFloatArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodFloatArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodLongArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "voidMethodLongArg", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID_EXCEPTIONSTATE(int, longArg, toInt32(info[0], exceptionState), exceptionState);
+    int longArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(longArg, toInt32(info[0], exceptionState), exceptionState);
+    }
     impl->voidMethodLongArg(longArg);
 }
 
 static void voidMethodLongArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodLongArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodLongLongArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "voidMethodLongLongArg", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID_EXCEPTIONSTATE(long long, longLongArg, toInt64(info[0], exceptionState), exceptionState);
+    long long longLongArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(longLongArg, toInt64(info[0], exceptionState), exceptionState);
+    }
     impl->voidMethodLongLongArg(longLongArg);
 }
 
 static void voidMethodLongLongArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodLongLongArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodOctetArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "voidMethodOctetArg", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID_EXCEPTIONSTATE(unsigned, octetArg, toUInt8(info[0], exceptionState), exceptionState);
+    unsigned octetArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(octetArg, toUInt8(info[0], exceptionState), exceptionState);
+    }
     impl->voidMethodOctetArg(octetArg);
 }
 
 static void voidMethodOctetArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodOctetArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodShortArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "voidMethodShortArg", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID_EXCEPTIONSTATE(int, shortArg, toInt16(info[0], exceptionState), exceptionState);
+    int shortArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(shortArg, toInt16(info[0], exceptionState), exceptionState);
+    }
     impl->voidMethodShortArg(shortArg);
 }
 
 static void voidMethodShortArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodShortArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodUnsignedLongArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "voidMethodUnsignedLongArg", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID_EXCEPTIONSTATE(unsigned, unsignedLongArg, toUInt32(info[0], exceptionState), exceptionState);
+    unsigned unsignedLongArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(unsignedLongArg, toUInt32(info[0], exceptionState), exceptionState);
+    }
     impl->voidMethodUnsignedLongArg(unsignedLongArg);
 }
 
 static void voidMethodUnsignedLongArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodUnsignedLongArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodUnsignedLongLongArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "voidMethodUnsignedLongLongArg", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID_EXCEPTIONSTATE(unsigned long long, unsignedLongLongArg, toUInt64(info[0], exceptionState), exceptionState);
+    unsigned long long unsignedLongLongArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(unsignedLongLongArg, toUInt64(info[0], exceptionState), exceptionState);
+    }
     impl->voidMethodUnsignedLongLongArg(unsignedLongLongArg);
 }
 
 static void voidMethodUnsignedLongLongArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodUnsignedLongLongArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodUnsignedShortArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "voidMethodUnsignedShortArg", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID_EXCEPTIONSTATE(unsigned, unsignedShortArg, toUInt16(info[0], exceptionState), exceptionState);
+    unsigned unsignedShortArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(unsignedShortArg, toUInt16(info[0], exceptionState), exceptionState);
+    }
     impl->voidMethodUnsignedShortArg(unsignedShortArg);
 }
 
 static void voidMethodUnsignedShortArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodUnsignedShortArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
@@ skipping 10 matching lines @@
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodTestInterfaceEmptyArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodTestInterfaceEmptyArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(TestInterfaceEmpty*, testInterfaceEmptyArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
+    TestInterfaceEmpty* testInterfaceEmptyArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(testInterfaceEmptyArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
+    }
     impl->voidMethodTestInterfaceEmptyArg(testInterfaceEmptyArg);
 }
 
 static void voidMethodTestInterfaceEmptyArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodTestInterfaceEmptyArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodLongArgTestInterfaceEmptyArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "voidMethodLongArgTestInterfaceEmptyArg", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 2)) {
         throwArityTypeError(exceptionState, 2, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID_EXCEPTIONSTATE(int, longArg, toInt32(info[0], exceptionState), exceptionState);
-    TONATIVE_VOID(TestInterfaceEmpty*, testInterfaceEmptyArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[1]));
+    int longArg;
+    TestInterfaceEmpty* testInterfaceEmptyArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(longArg, toInt32(info[0], exceptionState), exceptionState);
+        TONATIVE_VOID_NO_DECL(testInterfaceEmptyArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[1]));
+    }
     impl->voidMethodLongArgTestInterfaceEmptyArg(longArg, testInterfaceEmptyArg);
 }
 
 static void voidMethodLongArgTestInterfaceEmptyArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodLongArgTestInterfaceEmptyArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
@@ skipping 23 matching lines @@
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodVoidCallbackFunctionArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodVoidCallbackFunctionArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(ScriptValue, voidCallbackFunctionArg, ScriptValue(ScriptState::current(info.GetIsolate()), info[0]));
+    ScriptValue voidCallbackFunctionArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(voidCallbackFunctionArg, ScriptValue(ScriptState::current(info.GetIsolate()), info[0]));
+    }
     impl->voidMethodVoidCallbackFunctionArg(voidCallbackFunctionArg);
 }
 
 static void voidMethodVoidCallbackFunctionArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodVoidCallbackFunctionArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodAnyCallbackFunctionOptionalAnyArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodAnyCallbackFunctionOptionalAnyArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(ScriptValue, anyCallbackFunctionOptionalAnyArgArg, ScriptValue(ScriptState::current(info.GetIsolate()), info[0]));
+    ScriptValue anyCallbackFunctionOptionalAnyArgArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(anyCallbackFunctionOptionalAnyArgArg, ScriptValue(ScriptState::current(info.GetIsolate()), info[0]));
+    }
     impl->voidMethodAnyCallbackFunctionOptionalAnyArg(anyCallbackFunctionOptionalAnyArgArg);
 }
 
 static void voidMethodAnyCallbackFunctionOptionalAnyArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodAnyCallbackFunctionOptionalAnyArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
@@ skipping 23 matching lines @@
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodCompareHowArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodCompareHowArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(Range::CompareHow, compareHowArg, static_cast<Range::CompareHow>(info[0]->Int32Value()));
+    Range::CompareHow compareHowArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(compareHowArg, static_cast<Range::CompareHow>(info[0]->Int32Value()));
+    }
     impl->voidMethodCompareHowArg(compareHowArg);
 }
 
 static void voidMethodCompareHowArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodCompareHowArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodEventTargetArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodEventTargetArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(EventTarget*, eventTargetArg, V8DOMWrapper::isDOMWrapper(info[0]) ? toWrapperTypeInfo(v8::Handle<v8::Object>::Cast(info[0]))->toEventTarget(v8::Handle<v8::Object>::Cast(info[0])) : 0);
+    EventTarget* eventTargetArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(eventTargetArg, V8DOMWrapper::isDOMWrapper(info[0]) ? toWrapperTypeInfo(v8::Handle<v8::Object>::Cast(info[0]))->toEventTarget(v8::Handle<v8::Object>::Cast(info[0])) : 0);
+    }
     impl->voidMethodEventTargetArg(eventTargetArg);
 }
 
 static void voidMethodEventTargetArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodEventTargetArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodMediaQueryListListenerArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodMediaQueryListListenerArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(RefPtrWillBeRawPtr<MediaQueryListListener>, mediaQueryListListenerArg, MediaQueryListListener::create(ScriptValue(ScriptState::current(info.GetIsolate()), info[0])));
+    RefPtrWillBeRawPtr<MediaQueryListListener> mediaQueryListListenerArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(mediaQueryListListenerArg, MediaQueryListListener::create(ScriptValue(ScriptState::current(info.GetIsolate()), info[0])));
+    }
     impl->voidMethodMediaQueryListListenerArg(mediaQueryListListenerArg);
 }
 
 static void voidMethodMediaQueryListListenerArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodMediaQueryListListenerArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodAnyArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodAnyArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(ScriptValue, anyArg, ScriptValue(ScriptState::current(info.GetIsolate()), info[0]));
+    ScriptValue anyArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(anyArg, ScriptValue(ScriptState::current(info.GetIsolate()), info[0]));
+    }
     impl->voidMethodAnyArg(anyArg);
 }
 
 static void voidMethodAnyArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodAnyArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodAttrArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodAttrArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(Attr*, attrArg, V8Attr::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
+    Attr* attrArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(attrArg, V8Attr::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
+    }
     impl->voidMethodAttrArg(attrArg);
 }
 
 static void voidMethodAttrArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodAttrArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodDocumentArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodDocumentArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(Document*, documentArg, V8Document::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
+    Document* documentArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(documentArg, V8Document::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
+    }
     impl->voidMethodDocumentArg(documentArg);
 }
 
 static void voidMethodDocumentArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodDocumentArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodDocumentTypeArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodDocumentTypeArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(DocumentType*, documentTypeArg, V8DocumentType::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
+    DocumentType* documentTypeArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(documentTypeArg, V8DocumentType::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
+    }
     impl->voidMethodDocumentTypeArg(documentTypeArg);
 }
 
 static void voidMethodDocumentTypeArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodDocumentTypeArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodElementArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodElementArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(Element*, elementArg, V8Element::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
+    Element* elementArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(elementArg, V8Element::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
+    }
     impl->voidMethodElementArg(elementArg);
 }
 
 static void voidMethodElementArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodElementArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodNodeArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodNodeArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(Node*, nodeArg, V8Node::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
+    Node* nodeArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(nodeArg, V8Node::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
+    }
     impl->voidMethodNodeArg(nodeArg);
 }
 
 static void voidMethodNodeArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodNodeArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
@@ skipping 62 matching lines @@
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodArrayBufferArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodArrayBufferArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(ArrayBuffer*, arrayBufferArg, info[0]->IsArrayBuffer() ? V8ArrayBuffer::toNative(v8::Handle<v8::ArrayBuffer>::Cast(info[0])) : 0);
+    ArrayBuffer* arrayBufferArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(arrayBufferArg, info[0]->IsArrayBuffer() ? V8ArrayBuffer::toNative(v8::Handle<v8::ArrayBuffer>::Cast(info[0])) : 0);
+    }
     impl->voidMethodArrayBufferArg(arrayBufferArg);
 }
 
 static void voidMethodArrayBufferArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodArrayBufferArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodArrayBufferOrNullArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodArrayBufferOrNullArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(ArrayBuffer*, arrayBufferArg, info[0]->IsArrayBuffer() ? V8ArrayBuffer::toNative(v8::Handle<v8::ArrayBuffer>::Cast(info[0])) : 0);
+    ArrayBuffer* arrayBufferArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(arrayBufferArg, info[0]->IsArrayBuffer() ? V8ArrayBuffer::toNative(v8::Handle<v8::ArrayBuffer>::Cast(info[0])) : 0);
+    }
     impl->voidMethodArrayBufferOrNullArg(arrayBufferArg);
 }
 
 static void voidMethodArrayBufferOrNullArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodArrayBufferOrNullArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodArrayBufferViewArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodArrayBufferViewArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(ArrayBufferView*, arrayBufferViewArg, info[0]->IsArrayBufferView() ? V8ArrayBufferView::toNative(v8::Handle<v8::ArrayBufferView>::Cast(info[0])) : 0);
+    ArrayBufferView* arrayBufferViewArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(arrayBufferViewArg, info[0]->IsArrayBufferView() ? V8ArrayBufferView::toNative(v8::Handle<v8::ArrayBufferView>::Cast(info[0])) : 0);
+    }
     impl->voidMethodArrayBufferViewArg(arrayBufferViewArg);
 }
 
 static void voidMethodArrayBufferViewArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodArrayBufferViewArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodFloat32ArrayArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodFloat32ArrayArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(Float32Array*, float32ArrayArg, info[0]->IsFloat32Array() ? V8Float32Array::toNative(v8::Handle<v8::Float32Array>::Cast(info[0])) : 0);
+    Float32Array* float32ArrayArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(float32ArrayArg, info[0]->IsFloat32Array() ? V8Float32Array::toNative(v8::Handle<v8::Float32Array>::Cast(info[0])) : 0);
+    }
     impl->voidMethodFloat32ArrayArg(float32ArrayArg);
 }
 
 static void voidMethodFloat32ArrayArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodFloat32ArrayArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodInt32ArrayArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodInt32ArrayArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(Int32Array*, int32ArrayArg, info[0]->IsInt32Array() ? V8Int32Array::toNative(v8::Handle<v8::Int32Array>::Cast(info[0])) : 0);
+    Int32Array* int32ArrayArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(int32ArrayArg, info[0]->IsInt32Array() ? V8Int32Array::toNative(v8::Handle<v8::Int32Array>::Cast(info[0])) : 0);
+    }
     impl->voidMethodInt32ArrayArg(int32ArrayArg);
 }
 
 static void voidMethodInt32ArrayArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodInt32ArrayArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodUint8ArrayArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodUint8ArrayArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(Uint8Array*, uint8ArrayArg, info[0]->IsUint8Array() ? V8Uint8Array::toNative(v8::Handle<v8::Uint8Array>::Cast(info[0])) : 0);
+    Uint8Array* uint8ArrayArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(uint8ArrayArg, info[0]->IsUint8Array() ? V8Uint8Array::toNative(v8::Handle<v8::Uint8Array>::Cast(info[0])) : 0);
+    }
     impl->voidMethodUint8ArrayArg(uint8ArrayArg);
 }
 
 static void voidMethodUint8ArrayArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodUint8ArrayArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
@@ skipping 36 matching lines @@
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodArrayLongArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodArrayLongArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(Vector<int>, arrayLongArg, toNativeArray<int>(info[0], 1, info.GetIsolate()));
+    Vector<int> arrayLongArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(arrayLongArg, toNativeArray<int>(info[0], 1, info.GetIsolate()));
+    }
     impl->voidMethodArrayLongArg(arrayLongArg);
 }
 
 static void voidMethodArrayLongArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodArrayLongArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodArrayStringArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodArrayStringArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(Vector<String>, arrayStringArg, toNativeArray<String>(info[0], 1, info.GetIsolate()));
+    Vector<String> arrayStringArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(arrayStringArg, toNativeArray<String>(info[0], 1, info.GetIsolate()));
+    }
     impl->voidMethodArrayStringArg(arrayStringArg);
 }
 
 static void voidMethodArrayStringArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodArrayStringArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodArrayTestInterfaceEmptyArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodArrayTestInterfaceEmptyArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(Vector<RefPtr<TestInterfaceEmpty> >, arrayTestInterfaceEmptyArg, (toRefPtrNativeArray<TestInterfaceEmpty, V8TestInterfaceEmpty>(info[0], 1, info.GetIsolate())));
+    Vector<RefPtr<TestInterfaceEmpty> > arrayTestInterfaceEmptyArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(arrayTestInterfaceEmptyArg, (toRefPtrNativeArray<TestInterfaceEmpty, V8TestInterfaceEmpty>(info[0], 1, info.GetIsolate())));
+    }
     impl->voidMethodArrayTestInterfaceEmptyArg(arrayTestInterfaceEmptyArg);
 }
 
 static void voidMethodArrayTestInterfaceEmptyArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodArrayTestInterfaceEmptyArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
@@ skipping 36 matching lines @@
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodSequenceLongArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodSequenceLongArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(Vector<int>, longSequenceArg, toNativeArray<int>(info[0], 1, info.GetIsolate()));
+    Vector<int> longSequenceArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(longSequenceArg, toNativeArray<int>(info[0], 1, info.GetIsolate()));
+    }
     impl->voidMethodSequenceLongArg(longSequenceArg);
 }
 
 static void voidMethodSequenceLongArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodSequenceLongArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodSequenceStringArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodSequenceStringArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(Vector<String>, stringSequenceArg, toNativeArray<String>(info[0], 1, info.GetIsolate()));
+    Vector<String> stringSequenceArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(stringSequenceArg, toNativeArray<String>(info[0], 1, info.GetIsolate()));
+    }
     impl->voidMethodSequenceStringArg(stringSequenceArg);
 }
 
 static void voidMethodSequenceStringArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodSequenceStringArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodSequenceTestInterfaceEmptyArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodSequenceTestInterfaceEmptyArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(Vector<RefPtr<TestInterfaceEmpty> >, testInterfaceEmptySequenceArg, (toRefPtrNativeArray<TestInterfaceEmpty, V8TestInterfaceEmpty>(info[0], 1, info.GetIsolate())));
+    Vector<RefPtr<TestInterfaceEmpty> > testInterfaceEmptySequenceArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(testInterfaceEmptySequenceArg, (toRefPtrNativeArray<TestInterfaceEmpty, V8TestInterfaceEmpty>(info[0], 1, info.GetIsolate())));
+    }
     impl->voidMethodSequenceTestInterfaceEmptyArg(testInterfaceEmptySequenceArg);
 }
 
 static void voidMethodSequenceTestInterfaceEmptyArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodSequenceTestInterfaceEmptyArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodTestInterfaceEmptyOrNullArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodTestInterfaceEmptyOrNullArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(TestInterfaceEmpty*, nullableTestInterfaceEmptyArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
+    TestInterfaceEmpty* nullableTestInterfaceEmptyArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(nullableTestInterfaceEmptyArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
+    }
     impl->voidMethodTestInterfaceEmptyOrNullArg(nullableTestInterfaceEmptyArg);
 }
 
 static void voidMethodTestInterfaceEmptyOrNullArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodTestInterfaceEmptyOrNullArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodTestCallbackInterfaceArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodTestCallbackInterfaceArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    if (info.Length() <= 0 || !info[0]->IsFunction()) {
-        throwTypeError(ExceptionMessages::failedToExecute("voidMethodTestCallbackInterfaceArg", "TestObject", "The callback provided as parameter 1 is not a function."), info.GetIsolate());
-        return;
+    OwnPtr<TestCallbackInterface> testCallbackInterfaceArg;
+    {
+        if (info.Length() <= 0 || !info[0]->IsFunction()) {
+            throwTypeError(ExceptionMessages::failedToExecute("voidMethodTestCallbackInterfaceArg", "TestObject", "The callback provided as parameter 1 is not a function."), info.GetIsolate());
+            return;
+        }
+        testCallbackInterfaceArg = V8TestCallbackInterface::create(v8::Handle<v8::Function>::Cast(info[0]), currentExecutionContext(info.GetIsolate()));
     }
-    OwnPtr<TestCallbackInterface> testCallbackInterfaceArg = V8TestCallbackInterface::create(v8::Handle<v8::Function>::Cast(info[0]), currentExecutionContext(info.GetIsolate()));
     impl->voidMethodTestCallbackInterfaceArg(testCallbackInterfaceArg.release());
 }
 
 static void voidMethodTestCallbackInterfaceArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodTestCallbackInterfaceArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodOptionalTestCallbackInterfaceArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestObject* impl = V8TestObject::toNative(info.Holder());
     OwnPtr<TestCallbackInterface> optionalTestCallbackInterfaceArg;
-    if (info.Length() > 0 && !isUndefinedOrNull(info[0])) {
-        if (!info[0]->IsFunction()) {
-            throwTypeError(ExceptionMessages::failedToExecute("voidMethodOptionalTestCallbackInterfaceArg", "TestObject", "The callback provided as parameter 1 is not a function."), info.GetIsolate());
-            return;
+    {
+        if (info.Length() > 0 && !isUndefinedOrNull(info[0])) {
+            if (!info[0]->IsFunction()) {
+                throwTypeError(ExceptionMessages::failedToExecute("voidMethodOptionalTestCallbackInterfaceArg", "TestObject", "The callback provided as parameter 1 is not a function."), info.GetIsolate());
+                return;
+            }
+            optionalTestCallbackInterfaceArg = V8TestCallbackInterface::create(v8::Handle<v8::Function>::Cast(info[0]), currentExecutionContext(info.GetIsolate()));
         }
-        optionalTestCallbackInterfaceArg = V8TestCallbackInterface::create(v8::Handle<v8::Function>::Cast(info[0]), currentExecutionContext(info.GetIsolate()));
     }
     impl->voidMethodOptionalTestCallbackInterfaceArg(optionalTestCallbackInterfaceArg.release());
 }
 
 static void voidMethodOptionalTestCallbackInterfaceArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodOptionalTestCallbackInterfaceArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodTestCallbackInterfaceOrNullArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodTestCallbackInterfaceOrNullArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    if (info.Length() <= 0 || !(info[0]->IsFunction() || info[0]->IsNull())) {
-        throwTypeError(ExceptionMessages::failedToExecute("voidMethodTestCallbackInterfaceOrNullArg", "TestObject", "The callback provided as parameter 1 is not a function."), info.GetIsolate());
-        return;
+    OwnPtr<TestCallbackInterface> testCallbackInterfaceArg;
+    {
+        if (info.Length() <= 0 || !(info[0]->IsFunction() || info[0]->IsNull())) {
+            throwTypeError(ExceptionMessages::failedToExecute("voidMethodTestCallbackInterfaceOrNullArg", "TestObject", "The callback provided as parameter 1 is not a function."), info.GetIsolate());
+            return;
+        }
+        testCallbackInterfaceArg = info[0]->IsNull() ? nullptr : V8TestCallbackInterface::create(v8::Handle<v8::Function>::Cast(info[0]), currentExecutionContext(info.GetIsolate()));
     }
-    OwnPtr<TestCallbackInterface> testCallbackInterfaceArg = info[0]->IsNull() ? nullptr : V8TestCallbackInterface::create(v8::Handle<v8::Function>::Cast(info[0]), currentExecutionContext(info.GetIsolate()));
     impl->voidMethodTestCallbackInterfaceOrNullArg(testCallbackInterfaceArg.release());
 }
 
 static void voidMethodTestCallbackInterfaceOrNullArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodTestCallbackInterfaceOrNullArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
@@ skipping 10 matching lines @@
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodTestEnumArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodTestEnumArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TOSTRING_VOID(V8StringResource<>, testEnumTypeArg, info[0]);
-    String string = testEnumTypeArg;
-    if (!(string == "" || string == "EnumValue1" || string == "EnumValue2" || string == "EnumValue3")) {
-        throwTypeError(ExceptionMessages::failedToExecute("voidMethodTestEnumArg", "TestObject", "parameter 1 ('" + string + "') is not a valid enum value."), info.GetIsolate());
-        return;
+    V8StringResource<> testEnumTypeArg;
+    {
+        v8::TryCatch block;
+        TOSTRING_VOID_NO_DECL(testEnumTypeArg, info[0]);
+        String string = testEnumTypeArg;
+        if (!(string == "" || string == "EnumValue1" || string == "EnumValue2" || string == "EnumValue3")) {
+            throwTypeError(ExceptionMessages::failedToExecute("voidMethodTestEnumArg", "TestObject", "parameter 1 ('" + string + "') is not a valid enum value."), info.GetIsolate());
+            return;
+        }
     }
     impl->voidMethodTestEnumArg(testEnumTypeArg);
 }
 
 static void voidMethodTestEnumArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodTestEnumArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
@@ skipping 63 matching lines @@
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodDictionaryArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodDictionaryArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(Dictionary, dictionaryArg, Dictionary(info[0], info.GetIsolate()));
-    if (!dictionaryArg.isUndefinedOrNull() && !dictionaryArg.isObject()) {
-        throwTypeError(ExceptionMessages::failedToExecute("voidMethodDictionaryArg", "TestObject", "parameter 1 ('dictionaryArg') is not an object."), info.GetIsolate());
-        return;
+    Dictionary dictionaryArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(dictionaryArg, Dictionary(info[0], info.GetIsolate()));
+        if (!dictionaryArg.isUndefinedOrNull() && !dictionaryArg.isObject()) {
+            throwTypeError(ExceptionMessages::failedToExecute("voidMethodDictionaryArg", "TestObject", "parameter 1 ('dictionaryArg') is not an object."), info.GetIsolate());
+            return;
+        }
     }
     impl->voidMethodDictionaryArg(dictionaryArg);
 }
 
 static void voidMethodDictionaryArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodDictionaryArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodEventListenerArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "voidMethodEventListenerArg", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    RefPtr<EventListener> eventListenerArg = V8EventListenerList::getEventListener(info[1], false, ListenerFindOrCreate);
+    RefPtr<EventListener> eventListenerArg;
+    {
+        eventListenerArg = V8EventListenerList::getEventListener(info[1], false, ListenerFindOrCreate);
+    }
     impl->voidMethodEventListenerArg(eventListenerArg);
     if (listener && !impl->toNode())
         removeHiddenValueFromArray(info.Holder(), info[1], V8TestObject::eventListenerCacheIndex, info.GetIsolate());
 }
 
 static void voidMethodEventListenerArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodEventListenerArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodNodeFilterArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodNodeFilterArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(RefPtr<NodeFilter>, nodeFilterArg, toNodeFilter(info[0], info.GetIsolate()));
+    RefPtr<NodeFilter> nodeFilterArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(nodeFilterArg, toNodeFilter(info[0], info.GetIsolate()));
+    }
     impl->voidMethodNodeFilterArg(nodeFilterArg.release());
 }
 
 static void voidMethodNodeFilterArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodNodeFilterArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodPromiseArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodPromiseArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(ScriptPromise, promiseArg, ScriptPromise(info[0], info.GetIsolate()));
-    if (!promiseArg.isUndefinedOrNull() && !promiseArg.isObject()) {
-        throwTypeError(ExceptionMessages::failedToExecute("voidMethodPromiseArg", "TestObject", "parameter 1 ('promiseArg') is not an object."), info.GetIsolate());
-        return;
+    ScriptPromise promiseArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(promiseArg, ScriptPromise(info[0], info.GetIsolate()));
+        if (!promiseArg.isUndefinedOrNull() && !promiseArg.isObject()) {
+            throwTypeError(ExceptionMessages::failedToExecute("voidMethodPromiseArg", "TestObject", "parameter 1 ('promiseArg') is not an object."), info.GetIsolate());
+            return;
+        }
     }
     impl->voidMethodPromiseArg(promiseArg);
 }
 
 static void voidMethodPromiseArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodPromiseArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodSerializedScriptValueArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "voidMethodSerializedScriptValueArg", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    RefPtr<SerializedScriptValue> serializedScriptValueArg = SerializedScriptValue::create(info[0], 0, 0, exceptionState, info.GetIsolate());
-    if (exceptionState.throwIfNeeded())
-        return;
+    RefPtr<SerializedScriptValue> serializedScriptValueArg;
+    {
+        serializedScriptValueArg = SerializedScriptValue::create(info[0], 0, 0, exceptionState, info.GetIsolate());
+        if (exceptionState.throwIfNeeded())
+            return;
+    }
     impl->voidMethodSerializedScriptValueArg(serializedScriptValueArg);
 }
 
 static void voidMethodSerializedScriptValueArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodSerializedScriptValueArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodXPathNSResolverArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodXPathNSResolverArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(RefPtrWillBeRawPtr<XPathNSResolver>, xPathNSResolverArg, toXPathNSResolver(info[0], info.GetIsolate()));
+    RefPtrWillBeRawPtr<XPathNSResolver> xPathNSResolverArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(xPathNSResolverArg, toXPathNSResolver(info[0], info.GetIsolate()));
+    }
     impl->voidMethodXPathNSResolverArg(xPathNSResolverArg.release());
 }
 
 static void voidMethodXPathNSResolverArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodXPathNSResolverArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodDictionarySequenceArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodDictionarySequenceArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(Vector<Dictionary>, dictionarySequenceArg, toNativeArray<Dictionary>(info[0], 1, info.GetIsolate()));
+    Vector<Dictionary> dictionarySequenceArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(dictionarySequenceArg, toNativeArray<Dictionary>(info[0], 1, info.GetIsolate()));
+    }
     impl->voidMethodDictionarySequenceArg(dictionarySequenceArg);
 }
 
 static void voidMethodDictionarySequenceArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodDictionarySequenceArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodStringArgLongArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "voidMethodStringArgLongArg", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 2)) {
         throwArityTypeError(exceptionState, 2, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TOSTRING_VOID(V8StringResource<>, stringArg, info[0]);
-    TONATIVE_VOID_EXCEPTIONSTATE(int, longArg, toInt32(info[1], exceptionState), exceptionState);
+    V8StringResource<> stringArg;
+    int longArg;
+    {
+        v8::TryCatch block;
+        TOSTRING_VOID_NO_DECL(stringArg, info[0]);
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(longArg, toInt32(info[1], exceptionState), exceptionState);
+    }
     impl->voidMethodStringArgLongArg(stringArg, longArg);
 }
 
 static void voidMethodStringArgLongArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodStringArgLongArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodOptionalStringArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    if (UNLIKELY(info.Length() <= 0)) {
-        impl->voidMethodOptionalStringArg();
-        return;
+    V8StringResource<> optionalStringArg;
+    {
+        v8::TryCatch block;
+        if (UNLIKELY(info.Length() <= 0)) {
+            impl->voidMethodOptionalStringArg();
+            return;
+        }
+        TOSTRING_VOID_NO_DECL(optionalStringArg, info[0]);
     }
-    TOSTRING_VOID(V8StringResource<>, optionalStringArg, info[0]);
     impl->voidMethodOptionalStringArg(optionalStringArg);
 }
 
 static void voidMethodOptionalStringArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodOptionalStringArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodOptionalTestInterfaceEmptyArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    if (UNLIKELY(info.Length() <= 0)) {
-        impl->voidMethodOptionalTestInterfaceEmptyArg();
-        return;
+    TestInterfaceEmpty* optionalTestInterfaceEmptyArg;
+    {
+        v8::TryCatch block;
+        if (UNLIKELY(info.Length() <= 0)) {
+            impl->voidMethodOptionalTestInterfaceEmptyArg();
+            return;
+        }
+        TONATIVE_VOID_NO_DECL(optionalTestInterfaceEmptyArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
     }
-    TONATIVE_VOID(TestInterfaceEmpty*, optionalTestInterfaceEmptyArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
     impl->voidMethodOptionalTestInterfaceEmptyArg(optionalTestInterfaceEmptyArg);
 }
 
 static void voidMethodOptionalTestInterfaceEmptyArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodOptionalTestInterfaceEmptyArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodOptionalLongArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "voidMethodOptionalLongArg", "TestObject", info.Holder(), info.GetIsolate());
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    if (UNLIKELY(info.Length() <= 0)) {
-        impl->voidMethodOptionalLongArg();
-        return;
+    int optionalLongArg;
+    {
+        v8::TryCatch block;
+        if (UNLIKELY(info.Length() <= 0)) {
+            impl->voidMethodOptionalLongArg();
+            return;
+        }
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(optionalLongArg, toInt32(info[0], exceptionState), exceptionState);
     }
-    TONATIVE_VOID_EXCEPTIONSTATE(int, optionalLongArg, toInt32(info[0], exceptionState), exceptionState);
     impl->voidMethodOptionalLongArg(optionalLongArg);
 }
 
 static void voidMethodOptionalLongArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodOptionalLongArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void stringMethodOptionalLongArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "stringMethodOptionalLongArg", "TestObject", info.Holder(), info.GetIsolate());
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    if (UNLIKELY(info.Length() <= 0)) {
-        v8SetReturnValueString(info, impl->stringMethodOptionalLongArg(), info.GetIsolate());
-        return;
+    int optionalLongArg;
+    {
+        v8::TryCatch block;
+        if (UNLIKELY(info.Length() <= 0)) {
+            v8SetReturnValueString(info, impl->stringMethodOptionalLongArg(), info.GetIsolate());
+            return;
+        }
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(optionalLongArg, toInt32(info[0], exceptionState), exceptionState);
     }
-    TONATIVE_VOID_EXCEPTIONSTATE(int, optionalLongArg, toInt32(info[0], exceptionState), exceptionState);
     v8SetReturnValueString(info, impl->stringMethodOptionalLongArg(optionalLongArg), info.GetIsolate());
 }
 
 static void stringMethodOptionalLongArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::stringMethodOptionalLongArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void testInterfaceEmptyMethodOptionalLongArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "testInterfaceEmptyMethodOptionalLongArg", "TestObject", info.Holder(), info.GetIsolate());
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    if (UNLIKELY(info.Length() <= 0)) {
-        v8SetReturnValue(info, impl->testInterfaceEmptyMethodOptionalLongArg());
-        return;
+    int optionalLongArg;
+    {
+        v8::TryCatch block;
+        if (UNLIKELY(info.Length() <= 0)) {
+            v8SetReturnValue(info, impl->testInterfaceEmptyMethodOptionalLongArg());
+            return;
+        }
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(optionalLongArg, toInt32(info[0], exceptionState), exceptionState);
     }
-    TONATIVE_VOID_EXCEPTIONSTATE(int, optionalLongArg, toInt32(info[0], exceptionState), exceptionState);
     v8SetReturnValue(info, impl->testInterfaceEmptyMethodOptionalLongArg(optionalLongArg));
 }
 
 static void testInterfaceEmptyMethodOptionalLongArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::testInterfaceEmptyMethodOptionalLongArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void longMethodOptionalLongArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "longMethodOptionalLongArg", "TestObject", info.Holder(), info.GetIsolate());
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    if (UNLIKELY(info.Length() <= 0)) {
-        v8SetReturnValueInt(info, impl->longMethodOptionalLongArg());
-        return;
+    int optionalLongArg;
+    {
+        v8::TryCatch block;
+        if (UNLIKELY(info.Length() <= 0)) {
+            v8SetReturnValueInt(info, impl->longMethodOptionalLongArg());
+            return;
+        }
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(optionalLongArg, toInt32(info[0], exceptionState), exceptionState);
     }
-    TONATIVE_VOID_EXCEPTIONSTATE(int, optionalLongArg, toInt32(info[0], exceptionState), exceptionState);
     v8SetReturnValueInt(info, impl->longMethodOptionalLongArg(optionalLongArg));
 }
 
 static void longMethodOptionalLongArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::longMethodOptionalLongArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodLongArgOptionalLongArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "voidMethodLongArgOptionalLongArg", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID_EXCEPTIONSTATE(int, longArg, toInt32(info[0], exceptionState), exceptionState);
-    if (UNLIKELY(info.Length() <= 1)) {
-        impl->voidMethodLongArgOptionalLongArg(longArg);
-        return;
+    int longArg;
+    int optionalLongArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(longArg, toInt32(info[0], exceptionState), exceptionState);
+        if (UNLIKELY(info.Length() <= 1)) {
+            impl->voidMethodLongArgOptionalLongArg(longArg);
+            return;
+        }
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(optionalLongArg, toInt32(info[1], exceptionState), exceptionState);
     }
-    TONATIVE_VOID_EXCEPTIONSTATE(int, optionalLongArg, toInt32(info[1], exceptionState), exceptionState);
     impl->voidMethodLongArgOptionalLongArg(longArg, optionalLongArg);
 }
 
 static void voidMethodLongArgOptionalLongArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodLongArgOptionalLongArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodLongArgOptionalLongArgOptionalLongArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "voidMethodLongArgOptionalLongArgOptionalLongArg", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID_EXCEPTIONSTATE(int, longArg, toInt32(info[0], exceptionState), exceptionState);
-    if (UNLIKELY(info.Length() <= 1)) {
-        impl->voidMethodLongArgOptionalLongArgOptionalLongArg(longArg);
-        return;
+    int longArg;
+    int optionalLongArg1;
+    int optionalLongArg2;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(longArg, toInt32(info[0], exceptionState), exceptionState);
+        if (UNLIKELY(info.Length() <= 1)) {
+            impl->voidMethodLongArgOptionalLongArgOptionalLongArg(longArg);
+            return;
+        }
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(optionalLongArg1, toInt32(info[1], exceptionState), exceptionState);
+        if (UNLIKELY(info.Length() <= 2)) {
+            impl->voidMethodLongArgOptionalLongArgOptionalLongArg(longArg, optionalLongArg1);
+            return;
+        }
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(optionalLongArg2, toInt32(info[2], exceptionState), exceptionState);
     }
-    TONATIVE_VOID_EXCEPTIONSTATE(int, optionalLongArg1, toInt32(info[1], exceptionState), exceptionState);
-    if (UNLIKELY(info.Length() <= 2)) {
-        impl->voidMethodLongArgOptionalLongArgOptionalLongArg(longArg, optionalLongArg1);
-        return;
-    }
-    TONATIVE_VOID_EXCEPTIONSTATE(int, optionalLongArg2, toInt32(info[2], exceptionState), exceptionState);
     impl->voidMethodLongArgOptionalLongArgOptionalLongArg(longArg, optionalLongArg1, optionalLongArg2);
 }
 
 static void voidMethodLongArgOptionalLongArgOptionalLongArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodLongArgOptionalLongArgOptionalLongArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodLongArgOptionalTestInterfaceEmptyArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "voidMethodLongArgOptionalTestInterfaceEmptyArg", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID_EXCEPTIONSTATE(int, longArg, toInt32(info[0], exceptionState), exceptionState);
-    if (UNLIKELY(info.Length() <= 1)) {
-        impl->voidMethodLongArgOptionalTestInterfaceEmptyArg(longArg);
-        return;
+    int longArg;
+    TestInterfaceEmpty* optionalTestInterfaceEmpty;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(longArg, toInt32(info[0], exceptionState), exceptionState);
+        if (UNLIKELY(info.Length() <= 1)) {
+            impl->voidMethodLongArgOptionalTestInterfaceEmptyArg(longArg);
+            return;
+        }
+        TONATIVE_VOID_NO_DECL(optionalTestInterfaceEmpty, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[1]));
     }
-    TONATIVE_VOID(TestInterfaceEmpty*, optionalTestInterfaceEmpty, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[1]));
     impl->voidMethodLongArgOptionalTestInterfaceEmptyArg(longArg, optionalTestInterfaceEmpty);
 }
 
 static void voidMethodLongArgOptionalTestInterfaceEmptyArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodLongArgOptionalTestInterfaceEmptyArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodTestInterfaceEmptyArgOptionalLongArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "voidMethodTestInterfaceEmptyArgOptionalLongArg", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(TestInterfaceEmpty*, optionalTestInterfaceEmpty, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
-    if (UNLIKELY(info.Length() <= 1)) {
-        impl->voidMethodTestInterfaceEmptyArgOptionalLongArg(optionalTestInterfaceEmpty);
-        return;
+    TestInterfaceEmpty* optionalTestInterfaceEmpty;
+    int longArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(optionalTestInterfaceEmpty, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
+        if (UNLIKELY(info.Length() <= 1)) {
+            impl->voidMethodTestInterfaceEmptyArgOptionalLongArg(optionalTestInterfaceEmpty);
+            return;
+        }
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(longArg, toInt32(info[1], exceptionState), exceptionState);
     }
-    TONATIVE_VOID_EXCEPTIONSTATE(int, longArg, toInt32(info[1], exceptionState), exceptionState);
     impl->voidMethodTestInterfaceEmptyArgOptionalLongArg(optionalTestInterfaceEmpty, longArg);
 }
 
 static void voidMethodTestInterfaceEmptyArgOptionalLongArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodTestInterfaceEmptyArgOptionalLongArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodOptionalDictionaryArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(Dictionary, optionalDictionaryArg, Dictionary(info[0], info.GetIsolate()));
-    if (!optionalDictionaryArg.isUndefinedOrNull() && !optionalDictionaryArg.isObject()) {
-        throwTypeError(ExceptionMessages::failedToExecute("voidMethodOptionalDictionaryArg", "TestObject", "parameter 1 ('optionalDictionaryArg') is not an object."), info.GetIsolate());
-        return;
+    Dictionary optionalDictionaryArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(optionalDictionaryArg, Dictionary(info[0], info.GetIsolate()));
+        if (!optionalDictionaryArg.isUndefinedOrNull() && !optionalDictionaryArg.isObject()) {
+            throwTypeError(ExceptionMessages::failedToExecute("voidMethodOptionalDictionaryArg", "TestObject", "parameter 1 ('optionalDictionaryArg') is not an object."), info.GetIsolate());
+            return;
+        }
     }
     impl->voidMethodOptionalDictionaryArg(optionalDictionaryArg);
 }
 
 static void voidMethodOptionalDictionaryArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodOptionalDictionaryArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodVariadicStringArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(Vector<String>, variadicStringArgs, toNativeArguments<String>(info, 0));
+    Vector<String> variadicStringArgs;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(variadicStringArgs, toNativeArguments<String>(info, 0));
+    }
     impl->voidMethodVariadicStringArg(variadicStringArgs);
 }
 
 static void voidMethodVariadicStringArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodVariadicStringArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodStringArgVariadicStringArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodStringArgVariadicStringArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TOSTRING_VOID(V8StringResource<>, stringArg, info[0]);
-    TONATIVE_VOID(Vector<String>, variadicStringArgs, toNativeArguments<String>(info, 1));
+    V8StringResource<> stringArg;
+    Vector<String> variadicStringArgs;
+    {
+        v8::TryCatch block;
+        TOSTRING_VOID_NO_DECL(stringArg, info[0]);
+        TONATIVE_VOID_NO_DECL(variadicStringArgs, toNativeArguments<String>(info, 1));
+    }
     impl->voidMethodStringArgVariadicStringArg(stringArg, variadicStringArgs);
 }
 
 static void voidMethodStringArgVariadicStringArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodStringArgVariadicStringArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodVariadicTestInterfaceEmptyArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestObject* impl = V8TestObject::toNative(info.Holder());
     Vector<RefPtr<TestInterfaceEmpty> > variadicTestInterfaceEmptyArgs;
-    for (int i = 0; i < info.Length(); ++i) {
-        if (!V8TestInterfaceEmpty::hasInstance(info[i], info.GetIsolate())) {
-            throwTypeError(ExceptionMessages::failedToExecute("voidMethodVariadicTestInterfaceEmptyArg", "TestObject", "parameter 1 is not of type 'TestInterfaceEmpty'."), info.GetIsolate());
-            return;
+    {
+        for (int i = 0; i < info.Length(); ++i) {
+            if (!V8TestInterfaceEmpty::hasInstance(info[i], info.GetIsolate())) {
+                throwTypeError(ExceptionMessages::failedToExecute("voidMethodVariadicTestInterfaceEmptyArg", "TestObject", "parameter 1 is not of type 'TestInterfaceEmpty'."), info.GetIsolate());
+                return;
+            }
+            variadicTestInterfaceEmptyArgs.append(V8TestInterfaceEmpty::toNative(v8::Handle<v8::Object>::Cast(info[i])));
         }
-        variadicTestInterfaceEmptyArgs.append(V8TestInterfaceEmpty::toNative(v8::Handle<v8::Object>::Cast(info[i])));
     }
     impl->voidMethodVariadicTestInterfaceEmptyArg(variadicTestInterfaceEmptyArgs);
 }
 
 static void voidMethodVariadicTestInterfaceEmptyArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodVariadicTestInterfaceEmptyArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodTestInterfaceEmptyArgVariadicTestInterfaceEmptyArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodTestInterfaceEmptyArgVariadicTestInterfaceEmptyArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(TestInterfaceEmpty*, testInterfaceEmptyArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
+    TestInterfaceEmpty* testInterfaceEmptyArg;
     Vector<RefPtr<TestInterfaceEmpty> > variadicTestInterfaceEmptyArgs;
-    for (int i = 1; i < info.Length(); ++i) {
-        if (!V8TestInterfaceEmpty::hasInstance(info[i], info.GetIsolate())) {
-            throwTypeError(ExceptionMessages::failedToExecute("voidMethodTestInterfaceEmptyArgVariadicTestInterfaceEmptyArg", "TestObject", "parameter 2 is not of type 'TestInterfaceEmpty'."), info.GetIsolate());
-            return;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(testInterfaceEmptyArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
+        for (int i = 1; i < info.Length(); ++i) {
+            if (!V8TestInterfaceEmpty::hasInstance(info[i], info.GetIsolate())) {
+                throwTypeError(ExceptionMessages::failedToExecute("voidMethodTestInterfaceEmptyArgVariadicTestInterfaceEmptyArg", "TestObject", "parameter 2 is not of type 'TestInterfaceEmpty'."), info.GetIsolate());
+                return;
+            }
+            variadicTestInterfaceEmptyArgs.append(V8TestInterfaceEmpty::toNative(v8::Handle<v8::Object>::Cast(info[i])));
         }
-        variadicTestInterfaceEmptyArgs.append(V8TestInterfaceEmpty::toNative(v8::Handle<v8::Object>::Cast(info[i])));
     }
     impl->voidMethodTestInterfaceEmptyArgVariadicTestInterfaceEmptyArg(testInterfaceEmptyArg, variadicTestInterfaceEmptyArgs);
 }
 
 static void voidMethodTestInterfaceEmptyArgVariadicTestInterfaceEmptyArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodTestInterfaceEmptyArgVariadicTestInterfaceEmptyArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodVariadicTestInterfaceGarbageCollectedArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestObject* impl = V8TestObject::toNative(info.Holder());
     HeapVector<Member<TestInterfaceGarbageCollected> > variadicTestInterfaceGarbageCollectedArg;
-    for (int i = 0; i < info.Length(); ++i) {
-        if (!V8TestInterfaceGarbageCollected::hasInstance(info[i], info.GetIsolate())) {
-            throwTypeError(ExceptionMessages::failedToExecute("voidMethodVariadicTestInterfaceGarbageCollectedArg", "TestObject", "parameter 1 is not of type 'TestInterfaceGarbageCollected'."), info.GetIsolate());
-            return;
+    {
+        for (int i = 0; i < info.Length(); ++i) {
+            if (!V8TestInterfaceGarbageCollected::hasInstance(info[i], info.GetIsolate())) {
+                throwTypeError(ExceptionMessages::failedToExecute("voidMethodVariadicTestInterfaceGarbageCollectedArg", "TestObject", "parameter 1 is not of type 'TestInterfaceGarbageCollected'."), info.GetIsolate());
+                return;
+            }
+            variadicTestInterfaceGarbageCollectedArg.append(V8TestInterfaceGarbageCollected::toNative(v8::Handle<v8::Object>::Cast(info[i])));
         }
-        variadicTestInterfaceGarbageCollectedArg.append(V8TestInterfaceGarbageCollected::toNative(v8::Handle<v8::Object>::Cast(info[i])));
     }
     impl->voidMethodVariadicTestInterfaceGarbageCollectedArg(variadicTestInterfaceGarbageCollectedArg);
 }
 
 static void voidMethodVariadicTestInterfaceGarbageCollectedArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodVariadicTestInterfaceGarbageCollectedArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodVariadicTestInterfaceWillBeGarbageCollectedArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestObject* impl = V8TestObject::toNative(info.Holder());
     WillBeHeapVector<RefPtrWillBeMember<TestInterfaceWillBeGarbageCollected> > variadicTestInterfaceWillBeGarbageCollectedArg;
-    for (int i = 0; i < info.Length(); ++i) {
-        if (!V8TestInterfaceWillBeGarbageCollected::hasInstance(info[i], info.GetIsolate())) {
-            throwTypeError(ExceptionMessages::failedToExecute("voidMethodVariadicTestInterfaceWillBeGarbageCollectedArg", "TestObject", "parameter 1 is not of type 'TestInterfaceWillBeGarbageCollected'."), info.GetIsolate());
-            return;
+    {
+        for (int i = 0; i < info.Length(); ++i) {
+            if (!V8TestInterfaceWillBeGarbageCollected::hasInstance(info[i], info.GetIsolate())) {
+                throwTypeError(ExceptionMessages::failedToExecute("voidMethodVariadicTestInterfaceWillBeGarbageCollectedArg", "TestObject", "parameter 1 is not of type 'TestInterfaceWillBeGarbageCollected'."), info.GetIsolate());
+                return;
+            }
+            variadicTestInterfaceWillBeGarbageCollectedArg.append(V8TestInterfaceWillBeGarbageCollected::toNative(v8::Handle<v8::Object>::Cast(info[i])));
         }
-        variadicTestInterfaceWillBeGarbageCollectedArg.append(V8TestInterfaceWillBeGarbageCollected::toNative(v8::Handle<v8::Object>::Cast(info[i])));
     }
     impl->voidMethodVariadicTestInterfaceWillBeGarbageCollectedArg(variadicTestInterfaceWillBeGarbageCollectedArg);
 }
 
 static void voidMethodVariadicTestInterfaceWillBeGarbageCollectedArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodVariadicTestInterfaceWillBeGarbageCollectedArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void overloadedMethodA1Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "overloadedMethodA", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID_EXCEPTIONSTATE(int, longArg, toInt32(info[0], exceptionState), exceptionState);
+    int longArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(longArg, toInt32(info[0], exceptionState), exceptionState);
+    }
     impl->overloadedMethodA(longArg);
 }
 
 static void overloadedMethodA2Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "overloadedMethodA", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 2)) {
         throwArityTypeError(exceptionState, 2, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID_EXCEPTIONSTATE(int, longArg1, toInt32(info[0], exceptionState), exceptionState);
-    TONATIVE_VOID_EXCEPTIONSTATE(int, longArg2, toInt32(info[1], exceptionState), exceptionState);
+    int longArg1;
+    int longArg2;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(longArg1, toInt32(info[0], exceptionState), exceptionState);
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(longArg2, toInt32(info[1], exceptionState), exceptionState);
+    }
     impl->overloadedMethodA(longArg1, longArg2);
 }
 
 static void overloadedMethodAMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (((info.Length() == 1))) {
         overloadedMethodA1Method(info);
         return;
     }
     if (((info.Length() == 2))) {
@@ skipping 17 matching lines @@
 }
 
 static void overloadedMethodB1Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "overloadedMethodB", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID_EXCEPTIONSTATE(int, longArg, toInt32(info[0], exceptionState), exceptionState);
+    int longArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(longArg, toInt32(info[0], exceptionState), exceptionState);
+    }
     impl->overloadedMethodB(longArg);
 }
 
 static void overloadedMethodB2Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "overloadedMethodB", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID_EXCEPTIONSTATE(int, longArg1, toInt32(info[0], exceptionState), exceptionState);
-    if (UNLIKELY(info.Length() <= 1)) {
-        impl->overloadedMethodB(longArg1);
-        return;
+    int longArg1;
+    int longArg2;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(longArg1, toInt32(info[0], exceptionState), exceptionState);
+        if (UNLIKELY(info.Length() <= 1)) {
+            impl->overloadedMethodB(longArg1);
+            return;
+        }
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(longArg2, toInt32(info[1], exceptionState), exceptionState);
     }
-    TONATIVE_VOID_EXCEPTIONSTATE(int, longArg2, toInt32(info[1], exceptionState), exceptionState);
     impl->overloadedMethodB(longArg1, longArg2);
 }
 
 static void overloadedMethodBMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (((info.Length() == 1))) {
         overloadedMethodB1Method(info);
         return;
     }
     if (((info.Length() == 1)) || ((info.Length() == 2))) {
@@ skipping 17 matching lines @@
 }
 
 static void overloadedMethodC1Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "overloadedMethodC", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID_EXCEPTIONSTATE(int, longArg, toInt32(info[0], exceptionState), exceptionState);
+    int longArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(longArg, toInt32(info[0], exceptionState), exceptionState);
+    }
     impl->overloadedMethodC(longArg);
 }
 
 static void overloadedMethodC2Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "overloadedMethodC", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID_EXCEPTIONSTATE(int, longArg, toInt32(info[0], exceptionState), exceptionState);
-    TONATIVE_VOID(Vector<int>, longArgs, toNativeArguments<int>(info, 1));
+    int longArg;
+    Vector<int> longArgs;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(longArg, toInt32(info[0], exceptionState), exceptionState);
+        TONATIVE_VOID_NO_DECL(longArgs, toNativeArguments<int>(info, 1));
+    }
     impl->overloadedMethodC(longArg, longArgs);
 }
 
 static void overloadedMethodCMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (((info.Length() == 1))) {
         overloadedMethodC1Method(info);
         return;
     }
     if () {
@@ skipping 17 matching lines @@
 }
 
 static void overloadedMethodD1Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "overloadedMethodD", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID_EXCEPTIONSTATE(int, longArg, toInt32(info[0], exceptionState), exceptionState);
+    int longArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(longArg, toInt32(info[0], exceptionState), exceptionState);
+    }
     impl->overloadedMethodD(longArg);
 }
 
 static void overloadedMethodD2Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("overloadedMethodD", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(TestInterfaceEmpty*, testInterfaceEmptyArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
+    TestInterfaceEmpty* testInterfaceEmptyArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(testInterfaceEmptyArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
+    }
     impl->overloadedMethodD(testInterfaceEmptyArg);
 }
 
 static void overloadedMethodDMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (((info.Length() == 1))) {
         overloadedMethodD1Method(info);
         return;
     }
     if (((info.Length() == 1) && (V8TestInterfaceEmpty::hasInstance(info[0], info.GetIsolate())))) {
@@ skipping 17 matching lines @@
 }
 
 static void overloadedMethodE1Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "overloadedMethodE", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID_EXCEPTIONSTATE(int, longArg, toInt32(info[0], exceptionState), exceptionState);
+    int longArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(longArg, toInt32(info[0], exceptionState), exceptionState);
+    }
     impl->overloadedMethodE(longArg);
 }
 
 static void overloadedMethodE2Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("overloadedMethodE", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(Vector<int>, longArrayArg, toNativeArray<int>(info[0], 1, info.GetIsolate()));
+    Vector<int> longArrayArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(longArrayArg, toNativeArray<int>(info[0], 1, info.GetIsolate()));
+    }
     impl->overloadedMethodE(longArrayArg);
 }
 
 static void overloadedMethodEMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (((info.Length() == 1))) {
         overloadedMethodE1Method(info);
         return;
     }
     if (((info.Length() == 1) && (info[0]->IsArray()))) {
@@ skipping 17 matching lines @@
 }
 
 static void overloadedMethodF1Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "overloadedMethodF", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID_EXCEPTIONSTATE(int, longArg, toInt32(info[0], exceptionState), exceptionState);
+    int longArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(longArg, toInt32(info[0], exceptionState), exceptionState);
+    }
     impl->overloadedMethodF(longArg);
 }
 
 static void overloadedMethodF2Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("overloadedMethodF", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(TestInterfaceEmpty*, testInterfaceEmptyOrNullArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
+    TestInterfaceEmpty* testInterfaceEmptyOrNullArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(testInterfaceEmptyOrNullArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
+    }
     impl->overloadedMethodF(testInterfaceEmptyOrNullArg);
 }
 
 static void overloadedMethodFMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (((info.Length() == 1))) {
         overloadedMethodF1Method(info);
         return;
     }
     if (((info.Length() == 1) && (info[0]->IsNull() || V8TestInterfaceEmpty::hasInstance(info[0], info.GetIsolate())))) {
@@ skipping 22 matching lines @@
     impl->overloadedMethodG();
 }
 
 static void overloadedMethodG2Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("overloadedMethodG", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TOSTRING_VOID(V8StringResource<>, legacyOverloadStringStringArg, info[0]);
+    V8StringResource<> legacyOverloadStringStringArg;
+    {
+        v8::TryCatch block;
+        TOSTRING_VOID_NO_DECL(legacyOverloadStringStringArg, info[0]);
+    }
     impl->overloadedMethodG(legacyOverloadStringStringArg);
 }
 
 static void overloadedMethodGMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (((info.Length() == 0))) {
         overloadedMethodG1Method(info);
         return;
     }
     if (((info.Length() == 1) && (isUndefinedOrNull(info[0]) || info[0]->IsString() || info[0]->IsObject()))) {
@@ skipping 16 matching lines @@
     impl->overloadedMethodH();
 }
 
 static void overloadedMethodH2Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("overloadedMethodH", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    if (info.Length() <= 0 || !info[0]->IsFunction()) {
-        throwTypeError(ExceptionMessages::failedToExecute("overloadedMethodH", "TestObject", "The callback provided as parameter 1 is not a function."), info.GetIsolate());
-        return;
+    OwnPtr<TestCallbackInterface> testCallbackInterfaceArg;
+    {
+        if (info.Length() <= 0 || !info[0]->IsFunction()) {
+            throwTypeError(ExceptionMessages::failedToExecute("overloadedMethodH", "TestObject", "The callback provided as parameter 1 is not a function."), info.GetIsolate());
+            return;
+        }
+        testCallbackInterfaceArg = V8TestCallbackInterface::create(v8::Handle<v8::Function>::Cast(info[0]), currentExecutionContext(info.GetIsolate()));
     }
-    OwnPtr<TestCallbackInterface> testCallbackInterfaceArg = V8TestCallbackInterface::create(v8::Handle<v8::Function>::Cast(info[0]), currentExecutionContext(info.GetIsolate()));
     impl->overloadedMethodH(testCallbackInterfaceArg.release());
 }
 
 static void overloadedMethodHMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (((info.Length() == 0))) {
         overloadedMethodH1Method(info);
         return;
     }
     if (((info.Length() == 1) && (info[0]->IsNull() || info[0]->IsFunction()))) {
@@ skipping 10 matching lines @@
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void overloadedMethodI1Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("overloadedMethodI", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(Dictionary, dictionaryArg, Dictionary(info[0], info.GetIsolate()));
-    if (!dictionaryArg.isUndefinedOrNull() && !dictionaryArg.isObject()) {
-        throwTypeError(ExceptionMessages::failedToExecute("overloadedMethodI", "TestObject", "parameter 1 ('dictionaryArg') is not an object."), info.GetIsolate());
-        return;
+    Dictionary dictionaryArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(dictionaryArg, Dictionary(info[0], info.GetIsolate()));
+        if (!dictionaryArg.isUndefinedOrNull() && !dictionaryArg.isObject()) {
+            throwTypeError(ExceptionMessages::failedToExecute("overloadedMethodI", "TestObject", "parameter 1 ('dictionaryArg') is not an object."), info.GetIsolate());
+            return;
+        }
     }
     impl->overloadedMethodI(dictionaryArg);
 }
 
 static void overloadedMethodI2Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("overloadedMethodI", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(double, doubleArg, static_cast<double>(info[0]->NumberValue()));
+    double doubleArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(doubleArg, static_cast<double>(info[0]->NumberValue()));
+    }
     impl->overloadedMethodI(doubleArg);
 }
 
 static void overloadedMethodIMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (((info.Length() == 1) && (info[0]->IsObject()))) {
         overloadedMethodI1Method(info);
         return;
     }
     if (((info.Length() == 1))) {
@@ skipping 17 matching lines @@
 }
 
 static void overloadedMethodJ1Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "overloadedMethodJ", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID_EXCEPTIONSTATE(int, longArg, toInt32(info[0], exceptionState), exceptionState);
+    int longArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(longArg, toInt32(info[0], exceptionState), exceptionState);
+    }
     impl->overloadedMethodJ(longArg);
 }
 
 static void overloadedMethodJ2Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("overloadedMethodJ", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(TestInterfaceEmpty*, testInterfaceEmptyOrNullArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
+    TestInterfaceEmpty* testInterfaceEmptyOrNullArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(testInterfaceEmptyOrNullArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
+    }
     impl->overloadedMethodJ(testInterfaceEmptyOrNullArg);
 }
 
 static void overloadedMethodJMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (((info.Length() == 1))) {
         overloadedMethodJ1Method(info);
         return;
     }
     if (((info.Length() == 1) && (isUndefinedOrNull(info[0]) || V8TestInterfaceEmpty::hasInstance(info[0], info.GetIsolate())))) {
@@ skipping 29 matching lines @@
 }
 
 static void overloadedPerWorldBindingsMethod2Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "overloadedPerWorldBindingsMethod", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID_EXCEPTIONSTATE(int, longArg, toInt32(info[0], exceptionState), exceptionState);
+    int longArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(longArg, toInt32(info[0], exceptionState), exceptionState);
+    }
     impl->overloadedPerWorldBindingsMethod(longArg);
 }
 
 static void overloadedPerWorldBindingsMethodMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (((info.Length() == 0))) {
         overloadedPerWorldBindingsMethod1Method(info);
         return;
     }
     if (((info.Length() == 1))) {
@@ skipping 11 matching lines @@
 }
 
 static void overloadedPerWorldBindingsMethod2MethodForMainWorld(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "overloadedPerWorldBindingsMethod", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID_EXCEPTIONSTATE(int, longArg, toInt32(info[0], exceptionState), exceptionState);
+    int longArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(longArg, toInt32(info[0], exceptionState), exceptionState);
+    }
     impl->overloadedPerWorldBindingsMethod(longArg);
 }
 
 static void overloadedPerWorldBindingsMethodMethodForMainWorld(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (((info.Length() == 0))) {
         overloadedPerWorldBindingsMethod1MethodForMainWorld(info);
         return;
     }
     if (((info.Length() == 1))) {
@@ skipping 10 matching lines @@
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void overloadedStaticMethod1Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "overloadedStaticMethod", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
-    TONATIVE_VOID_EXCEPTIONSTATE(int, longArg, toInt32(info[0], exceptionState), exceptionState);
+    int longArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(longArg, toInt32(info[0], exceptionState), exceptionState);
+    }
     TestObject::overloadedStaticMethod(longArg);
 }
 
 static void overloadedStaticMethod2Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "overloadedStaticMethod", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 2)) {
         throwArityTypeError(exceptionState, 2, info.Length());
         return;
     }
-    TONATIVE_VOID_EXCEPTIONSTATE(int, longArg1, toInt32(info[0], exceptionState), exceptionState);
-    TONATIVE_VOID_EXCEPTIONSTATE(int, longArg2, toInt32(info[1], exceptionState), exceptionState);
+    int longArg1;
+    int longArg2;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(longArg1, toInt32(info[0], exceptionState), exceptionState);
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(longArg2, toInt32(info[1], exceptionState), exceptionState);
+    }
     TestObject::overloadedStaticMethod(longArg1, longArg2);
 }
 
 static void overloadedStaticMethodMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (((info.Length() == 1))) {
         overloadedStaticMethod1Method(info);
         return;
     }
     if (((info.Length() == 2))) {
@@ skipping 18 matching lines @@
 
 static void voidMethodClampUnsignedShortArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "voidMethodClampUnsignedShortArg", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
     unsigned clampUnsignedShortArg = 0;
-    TONATIVE_VOID(double, clampUnsignedShortArgNativeValue, info[0]->NumberValue());
-    if (!std::isnan(clampUnsignedShortArgNativeValue))
-        clampUnsignedShortArg = clampTo<unsigned short>(clampUnsignedShortArgNativeValue);
+    {
+        v8::TryCatch block;
+        double clampUnsignedShortArgNativeValue;
+        TONATIVE_VOID_NO_DECL(clampUnsignedShortArgNativeValue, info[0]->NumberValue());
+        if (!std::isnan(clampUnsignedShortArgNativeValue))
+            clampUnsignedShortArg = clampTo<unsigned short>(clampUnsignedShortArgNativeValue);
+    }
     impl->voidMethodClampUnsignedShortArg(clampUnsignedShortArg);
 }
 
 static void voidMethodClampUnsignedShortArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodClampUnsignedShortArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodClampUnsignedLongArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "voidMethodClampUnsignedLongArg", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
     unsigned clampUnsignedLongArg = 0;
-    TONATIVE_VOID(double, clampUnsignedLongArgNativeValue, info[0]->NumberValue());
-    if (!std::isnan(clampUnsignedLongArgNativeValue))
-        clampUnsignedLongArg = clampTo<unsigned long>(clampUnsignedLongArgNativeValue);
+    {
+        v8::TryCatch block;
+        double clampUnsignedLongArgNativeValue;
+        TONATIVE_VOID_NO_DECL(clampUnsignedLongArgNativeValue, info[0]->NumberValue());
+        if (!std::isnan(clampUnsignedLongArgNativeValue))
+            clampUnsignedLongArg = clampTo<unsigned long>(clampUnsignedLongArgNativeValue);
+    }
     impl->voidMethodClampUnsignedLongArg(clampUnsignedLongArg);
 }
 
 static void voidMethodClampUnsignedLongArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodClampUnsignedLongArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodDefaultUndefinedTestInterfaceEmptyArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(TestInterfaceEmpty*, defaultUndefinedTestInterfaceEmptyArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
+    TestInterfaceEmpty* defaultUndefinedTestInterfaceEmptyArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(defaultUndefinedTestInterfaceEmptyArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
+    }
     impl->voidMethodDefaultUndefinedTestInterfaceEmptyArg(defaultUndefinedTestInterfaceEmptyArg);
 }
 
 static void voidMethodDefaultUndefinedTestInterfaceEmptyArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodDefaultUndefinedTestInterfaceEmptyArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodDefaultUndefinedLongArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "voidMethodDefaultUndefinedLongArg", "TestObject", info.Holder(), info.GetIsolate());
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID_EXCEPTIONSTATE(int, defaultUndefinedLongArg, toInt32(info[0], exceptionState), exceptionState);
+    int defaultUndefinedLongArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(defaultUndefinedLongArg, toInt32(info[0], exceptionState), exceptionState);
+    }
     impl->voidMethodDefaultUndefinedLongArg(defaultUndefinedLongArg);
 }
 
 static void voidMethodDefaultUndefinedLongArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodDefaultUndefinedLongArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodDefaultUndefinedStringArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TOSTRING_VOID(V8StringResource<>, defaultUndefinedStringArg, info[0]);
+    V8StringResource<> defaultUndefinedStringArg;
+    {
+        v8::TryCatch block;
+        TOSTRING_VOID_NO_DECL(defaultUndefinedStringArg, info[0]);
+    }
     impl->voidMethodDefaultUndefinedStringArg(defaultUndefinedStringArg);
 }
 
 static void voidMethodDefaultUndefinedStringArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodDefaultUndefinedStringArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodDefaultNullStringStringArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TOSTRING_VOID(V8StringResource<>, defaultNullStringStringArg, argumentOrNull(info, 0));
+    V8StringResource<> defaultNullStringStringArg;
+    {
+        v8::TryCatch block;
+        TOSTRING_VOID_NO_DECL(defaultNullStringStringArg, argumentOrNull(info, 0));
+    }
     impl->voidMethodDefaultNullStringStringArg(defaultNullStringStringArg);
 }
 
 static void voidMethodDefaultNullStringStringArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodDefaultNullStringStringArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodEnforceRangeLongArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "voidMethodEnforceRangeLongArg", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID_EXCEPTIONSTATE(int, enforceRangeLongArg, toInt32(info[0], EnforceRange, exceptionState), exceptionState);
+    int enforceRangeLongArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(enforceRangeLongArg, toInt32(info[0], EnforceRange, exceptionState), exceptionState);
+    }
     impl->voidMethodEnforceRangeLongArg(enforceRangeLongArg);
 }
 
 static void voidMethodEnforceRangeLongArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodEnforceRangeLongArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodTreatNullAsNullStringStringArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodTreatNullAsNullStringStringArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TOSTRING_VOID(V8StringResource<WithNullCheck>, treatNullAsNullStringStringArg, info[0]);
+    V8StringResource<WithNullCheck> treatNullAsNullStringStringArg;
+    {
+        v8::TryCatch block;
+        TOSTRING_VOID_NO_DECL(treatNullAsNullStringStringArg, info[0]);
+    }
     impl->voidMethodTreatNullAsNullStringStringArg(treatNullAsNullStringStringArg);
 }
 
 static void voidMethodTreatNullAsNullStringStringArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodTreatNullAsNullStringStringArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodTreatNullAsNullStringTreatUndefinedAsNullStringStringArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodTreatNullAsNullStringTreatUndefinedAsNullStringStringArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TOSTRING_VOID(V8StringResource<WithUndefinedOrNullCheck>, treatNullAsNullStringStringArg, info[0]);
+    V8StringResource<WithUndefinedOrNullCheck> treatNullAsNullStringStringArg;
+    {
+        v8::TryCatch block;
+        TOSTRING_VOID_NO_DECL(treatNullAsNullStringStringArg, info[0]);
+    }
     impl->voidMethodTreatNullAsNullStringTreatUndefinedAsNullStringStringArg(treatNullAsNullStringStringArg);
 }
 
 static void voidMethodTreatNullAsNullStringTreatUndefinedAsNullStringStringArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodTreatNullAsNullStringTreatUndefinedAsNullStringStringArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
@@ skipping 84 matching lines @@
 static void callWithScriptStateScriptArgumentsVoidMethodMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::callWithScriptStateScriptArgumentsVoidMethodMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void callWithScriptStateScriptArgumentsVoidMethodOptionalBooleanArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    if (UNLIKELY(info.Length() <= 0)) {
-        ScriptState* state = ScriptState::current(info.GetIsolate());
-        RefPtr<ScriptArguments> scriptArguments(createScriptArguments(info, 1));
-        impl->callWithScriptStateScriptArgumentsVoidMethodOptionalBooleanArg(state, scriptArguments.release());
-        return;
+    bool optionalBooleanArg;
+    {
+        v8::TryCatch block;
+        if (UNLIKELY(info.Length() <= 0)) {
+            ScriptState* state = ScriptState::current(info.GetIsolate());
+            RefPtr<ScriptArguments> scriptArguments(createScriptArguments(info, 1));
+            impl->callWithScriptStateScriptArgumentsVoidMethodOptionalBooleanArg(state, scriptArguments.release());
+            return;
+        }
+        TONATIVE_VOID_NO_DECL(optionalBooleanArg, info[0]->BooleanValue());
     }
-    TONATIVE_VOID(bool, optionalBooleanArg, info[0]->BooleanValue());
     ScriptState* state = ScriptState::current(info.GetIsolate());
     RefPtr<ScriptArguments> scriptArguments(createScriptArguments(info, 1));
     impl->callWithScriptStateScriptArgumentsVoidMethodOptionalBooleanArg(state, scriptArguments.release(), optionalBooleanArg);
 }
 
 static void callWithScriptStateScriptArgumentsVoidMethodOptionalBooleanArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::callWithScriptStateScriptArgumentsVoidMethodOptionalBooleanArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
@@ skipping 184 matching lines @@
 }
 
 static void DeprecateAsOverloadedMethod2Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "DeprecateAsOverloadedMethod", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID_EXCEPTIONSTATE(int, arg, toInt32(info[0], exceptionState), exceptionState);
+    int arg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(arg, toInt32(info[0], exceptionState), exceptionState);
+    }
     impl->DeprecateAsOverloadedMethod(arg);
 }
 
 static void DeprecateAsOverloadedMethodMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (((info.Length() == 0))) {
         UseCounter::countDeprecation(callingExecutionContext(info.GetIsolate()), UseCounter::TestFeatureA);
         DeprecateAsOverloadedMethod1Method(info);
         return;
     }
@@ skipping 19 matching lines @@
 }
 
 static void DeprecateAsSameValueOverloadedMethod2Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "DeprecateAsSameValueOverloadedMethod", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID_EXCEPTIONSTATE(int, arg, toInt32(info[0], exceptionState), exceptionState);
+    int arg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(arg, toInt32(info[0], exceptionState), exceptionState);
+    }
     impl->DeprecateAsSameValueOverloadedMethod(arg);
 }
 
 static void DeprecateAsSameValueOverloadedMethodMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     UseCounter::countDeprecation(callingExecutionContext(info.GetIsolate()), UseCounter::TestFeature);
     if (((info.Length() == 0))) {
         DeprecateAsSameValueOverloadedMethod1Method(info);
         return;
     }
@@ skipping 18 matching lines @@
 }
 
 static void measureAsOverloadedMethod2Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "measureAsOverloadedMethod", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID_EXCEPTIONSTATE(int, arg, toInt32(info[0], exceptionState), exceptionState);
+    int arg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(arg, toInt32(info[0], exceptionState), exceptionState);
+    }
     impl->measureAsOverloadedMethod(arg);
 }
 
 static void measureAsOverloadedMethodMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (((info.Length() == 0))) {
         UseCounter::count(callingExecutionContext(info.GetIsolate()), UseCounter::TestFeatureA);
         measureAsOverloadedMethod1Method(info);
         return;
     }
@@ skipping 19 matching lines @@
 }
 
 static void measureAsSameValueOverloadedMethod2Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "measureAsSameValueOverloadedMethod", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID_EXCEPTIONSTATE(int, arg, toInt32(info[0], exceptionState), exceptionState);
+    int arg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(arg, toInt32(info[0], exceptionState), exceptionState);
+    }
     impl->measureAsSameValueOverloadedMethod(arg);
 }
 
 static void measureAsSameValueOverloadedMethodMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     UseCounter::count(callingExecutionContext(info.GetIsolate()), UseCounter::TestFeature);
     if (((info.Length() == 0))) {
         measureAsSameValueOverloadedMethod1Method(info);
         return;
     }
@@ skipping 18 matching lines @@
 }
 
 static void deprecateAsMeasureAsSameValueOverloadedMethod2Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "deprecateAsMeasureAsSameValueOverloadedMethod", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID_EXCEPTIONSTATE(int, arg, toInt32(info[0], exceptionState), exceptionState);
+    int arg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(arg, toInt32(info[0], exceptionState), exceptionState);
+    }
     impl->deprecateAsMeasureAsSameValueOverloadedMethod(arg);
 }
 
 static void deprecateAsMeasureAsSameValueOverloadedMethodMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     UseCounter::count(callingExecutionContext(info.GetIsolate()), UseCounter::TestFeature);
     if (((info.Length() == 0))) {
         UseCounter::countDeprecation(callingExecutionContext(info.GetIsolate()), UseCounter::TestFeatureA);
         deprecateAsMeasureAsSameValueOverloadedMethod1Method(info);
         return;
@@ skipping 20 matching lines @@
 }
 
 static void deprecateAsSameValueMeasureAsOverloadedMethod2Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "deprecateAsSameValueMeasureAsOverloadedMethod", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID_EXCEPTIONSTATE(int, arg, toInt32(info[0], exceptionState), exceptionState);
+    int arg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(arg, toInt32(info[0], exceptionState), exceptionState);
+    }
     impl->deprecateAsSameValueMeasureAsOverloadedMethod(arg);
 }
 
 static void deprecateAsSameValueMeasureAsOverloadedMethodMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     UseCounter::countDeprecation(callingExecutionContext(info.GetIsolate()), UseCounter::TestFeature);
     if (((info.Length() == 0))) {
         UseCounter::count(callingExecutionContext(info.GetIsolate()), UseCounter::TestFeatureA);
         deprecateAsSameValueMeasureAsOverloadedMethod1Method(info);
         return;
@@ skipping 20 matching lines @@
 }
 
 static void deprecateAsSameValueMeasureAsSameValueOverloadedMethod2Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "deprecateAsSameValueMeasureAsSameValueOverloadedMethod", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID_EXCEPTIONSTATE(int, arg, toInt32(info[0], exceptionState), exceptionState);
+    int arg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(arg, toInt32(info[0], exceptionState), exceptionState);
+    }
     impl->deprecateAsSameValueMeasureAsSameValueOverloadedMethod(arg);
 }
 
 static void deprecateAsSameValueMeasureAsSameValueOverloadedMethodMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     UseCounter::count(callingExecutionContext(info.GetIsolate()), UseCounter::TestFeatureB);
     UseCounter::countDeprecation(callingExecutionContext(info.GetIsolate()), UseCounter::TestFeatureA);
     if (((info.Length() == 0))) {
         deprecateAsSameValueMeasureAsSameValueOverloadedMethod1Method(info);
         return;
@@ skipping 64 matching lines @@
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void perWorldBindingsVoidMethodTestInterfaceEmptyArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("perWorldBindingsVoidMethodTestInterfaceEmptyArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(TestInterfaceEmpty*, testInterfaceEmptyArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
+    TestInterfaceEmpty* testInterfaceEmptyArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(testInterfaceEmptyArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
+    }
     impl->perWorldBindingsVoidMethodTestInterfaceEmptyArg(testInterfaceEmptyArg);
 }
 
 static void perWorldBindingsVoidMethodTestInterfaceEmptyArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::perWorldBindingsVoidMethodTestInterfaceEmptyArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void perWorldBindingsVoidMethodTestInterfaceEmptyArgMethodForMainWorld(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("perWorldBindingsVoidMethodTestInterfaceEmptyArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(TestInterfaceEmpty*, testInterfaceEmptyArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
+    TestInterfaceEmpty* testInterfaceEmptyArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(testInterfaceEmptyArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
+    }
     impl->perWorldBindingsVoidMethodTestInterfaceEmptyArg(testInterfaceEmptyArg);
 }
 
 static void perWorldBindingsVoidMethodTestInterfaceEmptyArgMethodCallbackForMainWorld(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::perWorldBindingsVoidMethodTestInterfaceEmptyArgMethodForMainWorld(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
@@ skipping 94 matching lines @@
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::raisesExceptionStringMethodMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void raisesExceptionVoidMethodOptionalLongArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "raisesExceptionVoidMethodOptionalLongArg", "TestObject", info.Holder(), info.GetIsolate());
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    if (UNLIKELY(info.Length() <= 0)) {
-        impl->raisesExceptionVoidMethodOptionalLongArg(exceptionState);
-        if (exceptionState.throwIfNeeded())
+    int optionalLongArg;
+    {
+        v8::TryCatch block;
+        if (UNLIKELY(info.Length() <= 0)) {
+            impl->raisesExceptionVoidMethodOptionalLongArg(exceptionState);
+            if (exceptionState.throwIfNeeded())
+                return;
             return;
-        return;
+        }
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(optionalLongArg, toInt32(info[0], exceptionState), exceptionState);
     }
-    TONATIVE_VOID_EXCEPTIONSTATE(int, optionalLongArg, toInt32(info[0], exceptionState), exceptionState);
     impl->raisesExceptionVoidMethodOptionalLongArg(optionalLongArg, exceptionState);
     if (exceptionState.throwIfNeeded())
         return;
 }
 
 static void raisesExceptionVoidMethodOptionalLongArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::raisesExceptionVoidMethodOptionalLongArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void raisesExceptionVoidMethodTestCallbackInterfaceArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "raisesExceptionVoidMethodTestCallbackInterfaceArg", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    if (info.Length() <= 0 || !info[0]->IsFunction()) {
-        exceptionState.throwTypeError("The callback provided as parameter 1 is not a function.");
-        exceptionState.throwIfNeeded();
-        return;
+    OwnPtr<TestCallbackInterface> testCallbackInterfaceArg;
+    {
+        if (info.Length() <= 0 || !info[0]->IsFunction()) {
+            exceptionState.throwTypeError("The callback provided as parameter 1 is not a function.");
+            exceptionState.throwIfNeeded();
+            return;
+        }
+        testCallbackInterfaceArg = V8TestCallbackInterface::create(v8::Handle<v8::Function>::Cast(info[0]), currentExecutionContext(info.GetIsolate()));
     }
-    OwnPtr<TestCallbackInterface> testCallbackInterfaceArg = V8TestCallbackInterface::create(v8::Handle<v8::Function>::Cast(info[0]), currentExecutionContext(info.GetIsolate()));
     impl->raisesExceptionVoidMethodTestCallbackInterfaceArg(testCallbackInterfaceArg.release(), exceptionState);
     if (exceptionState.throwIfNeeded())
         return;
 }
 
 static void raisesExceptionVoidMethodTestCallbackInterfaceArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::raisesExceptionVoidMethodTestCallbackInterfaceArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void raisesExceptionVoidMethodOptionalTestCallbackInterfaceArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "raisesExceptionVoidMethodOptionalTestCallbackInterfaceArg", "TestObject", info.Holder(), info.GetIsolate());
     TestObject* impl = V8TestObject::toNative(info.Holder());
     OwnPtr<TestCallbackInterface> optionalTestCallbackInterfaceArg;
-    if (info.Length() > 0 && !isUndefinedOrNull(info[0])) {
-        if (!info[0]->IsFunction()) {
-            exceptionState.throwTypeError("The callback provided as parameter 1 is not a function.");
-            exceptionState.throwIfNeeded();
-            return;
+    {
+        if (info.Length() > 0 && !isUndefinedOrNull(info[0])) {
+            if (!info[0]->IsFunction()) {
+                exceptionState.throwTypeError("The callback provided as parameter 1 is not a function.");
+                exceptionState.throwIfNeeded();
+                return;
+            }
+            optionalTestCallbackInterfaceArg = V8TestCallbackInterface::create(v8::Handle<v8::Function>::Cast(info[0]), currentExecutionContext(info.GetIsolate()));
         }
-        optionalTestCallbackInterfaceArg = V8TestCallbackInterface::create(v8::Handle<v8::Function>::Cast(info[0]), currentExecutionContext(info.GetIsolate()));
     }
     impl->raisesExceptionVoidMethodOptionalTestCallbackInterfaceArg(optionalTestCallbackInterfaceArg.release(), exceptionState);
     if (exceptionState.throwIfNeeded())
         return;
 }
 
 static void raisesExceptionVoidMethodOptionalTestCallbackInterfaceArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::raisesExceptionVoidMethodOptionalTestCallbackInterfaceArgMethod(info);
@@ skipping 18 matching lines @@
 }
 
 static void callWithExecutionContextRaisesExceptionVoidMethodLongArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "callWithExecutionContextRaisesExceptionVoidMethodLongArg", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeError(exceptionState, 1, info.Length());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID_EXCEPTIONSTATE(int, longArg, toInt32(info[0], exceptionState), exceptionState);
+    int longArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(longArg, toInt32(info[0], exceptionState), exceptionState);
+    }
     ExecutionContext* scriptContext = currentExecutionContext(info.GetIsolate());
     impl->callWithExecutionContextRaisesExceptionVoidMethodLongArg(scriptContext, longArg, exceptionState);
     if (exceptionState.throwIfNeeded())
         return;
 }
 
 static void callWithExecutionContextRaisesExceptionVoidMethodLongArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::callWithExecutionContextRaisesExceptionVoidMethodLongArgMethod(info);
@@ skipping 91 matching lines @@
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void typeCheckingInterfaceVoidMethodTestInterfaceEmptyArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("typeCheckingInterfaceVoidMethodTestInterfaceEmptyArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    if (info.Length() > 0 && !V8TestInterfaceEmpty::hasInstance(info[0], info.GetIsolate())) {
-        throwTypeError(ExceptionMessages::failedToExecute("typeCheckingInterfaceVoidMethodTestInterfaceEmptyArg", "TestObject", "parameter 1 is not of type 'TestInterfaceEmpty'."), info.GetIsolate());
-        return;
+    TestInterfaceEmpty* testInterfaceEmptyArg;
+    {
+        v8::TryCatch block;
+        if (info.Length() > 0 && !V8TestInterfaceEmpty::hasInstance(info[0], info.GetIsolate())) {
+            throwTypeError(ExceptionMessages::failedToExecute("typeCheckingInterfaceVoidMethodTestInterfaceEmptyArg", "TestObject", "parameter 1 is not of type 'TestInterfaceEmpty'."), info.GetIsolate());
+            return;
+        }
+        TONATIVE_VOID_NO_DECL(testInterfaceEmptyArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
     }
-    TONATIVE_VOID(TestInterfaceEmpty*, testInterfaceEmptyArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
     impl->typeCheckingInterfaceVoidMethodTestInterfaceEmptyArg(testInterfaceEmptyArg);
 }
 
 static void typeCheckingInterfaceVoidMethodTestInterfaceEmptyArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::typeCheckingInterfaceVoidMethodTestInterfaceEmptyArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void typeCheckingNullableVoidMethodTestInterfaceEmptyOrNullArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("typeCheckingNullableVoidMethodTestInterfaceEmptyOrNullArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(TestInterfaceEmpty*, testInterfaceEmptyOrNullArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
+    TestInterfaceEmpty* testInterfaceEmptyOrNullArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(testInterfaceEmptyOrNullArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
+    }
     impl->typeCheckingNullableVoidMethodTestInterfaceEmptyOrNullArg(testInterfaceEmptyOrNullArg);
 }
 
 static void typeCheckingNullableVoidMethodTestInterfaceEmptyOrNullArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::typeCheckingNullableVoidMethodTestInterfaceEmptyOrNullArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void typeCheckingInterfaceNullableVoidMethodTestInterfaceEmptyOrNullArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("typeCheckingInterfaceNullableVoidMethodTestInterfaceEmptyOrNullArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    if (info.Length() > 0 && !isUndefinedOrNull(info[0]) && !V8TestInterfaceEmpty::hasInstance(info[0], info.GetIsolate())) {
-        throwTypeError(ExceptionMessages::failedToExecute("typeCheckingInterfaceNullableVoidMethodTestInterfaceEmptyOrNullArg", "TestObject", "parameter 1 is not of type 'TestInterfaceEmpty'."), info.GetIsolate());
-        return;
+    TestInterfaceEmpty* testInterfaceEmptyOrNullArg;
+    {
+        v8::TryCatch block;
+        if (info.Length() > 0 && !isUndefinedOrNull(info[0]) && !V8TestInterfaceEmpty::hasInstance(info[0], info.GetIsolate())) {
+            throwTypeError(ExceptionMessages::failedToExecute("typeCheckingInterfaceNullableVoidMethodTestInterfaceEmptyOrNullArg", "TestObject", "parameter 1 is not of type 'TestInterfaceEmpty'."), info.GetIsolate());
+            return;
+        }
+        TONATIVE_VOID_NO_DECL(testInterfaceEmptyOrNullArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
     }
-    TONATIVE_VOID(TestInterfaceEmpty*, testInterfaceEmptyOrNullArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
     impl->typeCheckingInterfaceNullableVoidMethodTestInterfaceEmptyOrNullArg(testInterfaceEmptyOrNullArg);
 }
 
 static void typeCheckingInterfaceNullableVoidMethodTestInterfaceEmptyOrNullArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::typeCheckingInterfaceNullableVoidMethodTestInterfaceEmptyOrNullArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void typeCheckingUnrestrictedVoidMethodFloatArgDoubleArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 2)) {
         throwArityTypeErrorForMethod("typeCheckingUnrestrictedVoidMethodFloatArgDoubleArg", "TestObject", 2, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(float, floatArg, static_cast<float>(info[0]->NumberValue()));
-    if (!std::isfinite(floatArg)) {
-        throwTypeError(ExceptionMessages::failedToExecute("typeCheckingUnrestrictedVoidMethodFloatArgDoubleArg", "TestObject", "float parameter 1 is non-finite."), info.GetIsolate());
-        return;
-    }
-    TONATIVE_VOID(double, doubleArg, static_cast<double>(info[1]->NumberValue()));
-    if (!std::isfinite(doubleArg)) {
-        throwTypeError(ExceptionMessages::failedToExecute("typeCheckingUnrestrictedVoidMethodFloatArgDoubleArg", "TestObject", "double parameter 2 is non-finite."), info.GetIsolate());
-        return;
+    float floatArg;
+    double doubleArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(floatArg, static_cast<float>(info[0]->NumberValue()));
+        if (!std::isfinite(floatArg)) {
+            throwTypeError(ExceptionMessages::failedToExecute("typeCheckingUnrestrictedVoidMethodFloatArgDoubleArg", "TestObject", "float parameter 1 is non-finite."), info.GetIsolate());
+            return;
+        }
+        TONATIVE_VOID_NO_DECL(doubleArg, static_cast<double>(info[1]->NumberValue()));
+        if (!std::isfinite(doubleArg)) {
+            throwTypeError(ExceptionMessages::failedToExecute("typeCheckingUnrestrictedVoidMethodFloatArgDoubleArg", "TestObject", "double parameter 2 is non-finite."), info.GetIsolate());
+            return;
+        }
     }
     impl->typeCheckingUnrestrictedVoidMethodFloatArgDoubleArg(floatArg, doubleArg);
 }
 
 static void typeCheckingUnrestrictedVoidMethodFloatArgDoubleArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::typeCheckingUnrestrictedVoidMethodFloatArgDoubleArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
@@ skipping 11 matching lines @@
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodTestInterfaceGarbageCollectedSequenceArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodTestInterfaceGarbageCollectedSequenceArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(HeapVector<Member<TestInterfaceGarbageCollected> >, testInterfaceGarbageCollectedSequenceArg, (toMemberNativeArray<TestInterfaceGarbageCollected, V8TestInterfaceGarbageCollected>(info[0], 1, info.GetIsolate())));
+    HeapVector<Member<TestInterfaceGarbageCollected> > testInterfaceGarbageCollectedSequenceArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(testInterfaceGarbageCollectedSequenceArg, (toMemberNativeArray<TestInterfaceGarbageCollected, V8TestInterfaceGarbageCollected>(info[0], 1, info.GetIsolate())));
+    }
     impl->voidMethodTestInterfaceGarbageCollectedSequenceArg(testInterfaceGarbageCollectedSequenceArg);
 }
 
 static void voidMethodTestInterfaceGarbageCollectedSequenceArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodTestInterfaceGarbageCollectedSequenceArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodTestInterfaceGarbageCollectedArrayArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodTestInterfaceGarbageCollectedArrayArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(HeapVector<Member<TestInterfaceGarbageCollected> >, testInterfaceGarbageCollectedArrayArg, (toMemberNativeArray<TestInterfaceGarbageCollected, V8TestInterfaceGarbageCollected>(info[0], 1, info.GetIsolate())));
+    HeapVector<Member<TestInterfaceGarbageCollected> > testInterfaceGarbageCollectedArrayArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(testInterfaceGarbageCollectedArrayArg, (toMemberNativeArray<TestInterfaceGarbageCollected, V8TestInterfaceGarbageCollected>(info[0], 1, info.GetIsolate())));
+    }
     impl->voidMethodTestInterfaceGarbageCollectedArrayArg(testInterfaceGarbageCollectedArrayArg);
 }
 
 static void voidMethodTestInterfaceGarbageCollectedArrayArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodTestInterfaceGarbageCollectedArrayArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodTestInterfaceWillBeGarbageCollectedSequenceArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodTestInterfaceWillBeGarbageCollectedSequenceArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(WillBeHeapVector<RefPtrWillBeMember<TestInterfaceWillBeGarbageCollected> >, testInterfaceWillBeGarbageCollectedSequenceArg, (toRefPtrWillBeMemberNativeArray<TestInterfaceWillBeGarbageCollected, V8TestInterfaceWillBeGarbageCollected>(info[0], 1, info.GetIsolate())));
+    WillBeHeapVector<RefPtrWillBeMember<TestInterfaceWillBeGarbageCollected> > testInterfaceWillBeGarbageCollectedSequenceArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(testInterfaceWillBeGarbageCollectedSequenceArg, (toRefPtrWillBeMemberNativeArray<TestInterfaceWillBeGarbageCollected, V8TestInterfaceWillBeGarbageCollected>(info[0], 1, info.GetIsolate())));
+    }
     impl->voidMethodTestInterfaceWillBeGarbageCollectedSequenceArg(testInterfaceWillBeGarbageCollectedSequenceArg);
 }
 
 static void voidMethodTestInterfaceWillBeGarbageCollectedSequenceArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodTestInterfaceWillBeGarbageCollectedSequenceArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodTestInterfaceWillBeGarbageCollectedArrayArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwArityTypeErrorForMethod("voidMethodTestInterfaceWillBeGarbageCollectedArrayArg", "TestObject", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toNative(info.Holder());
-    TONATIVE_VOID(WillBeHeapVector<RefPtrWillBeMember<TestInterfaceWillBeGarbageCollected> >, testInterfaceWillBeGarbageCollectedArrayArg, (toRefPtrWillBeMemberNativeArray<TestInterfaceWillBeGarbageCollected, V8TestInterfaceWillBeGarbageCollected>(info[0], 1, info.GetIsolate())));
+    WillBeHeapVector<RefPtrWillBeMember<TestInterfaceWillBeGarbageCollected> > testInterfaceWillBeGarbageCollectedArrayArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(testInterfaceWillBeGarbageCollectedArrayArg, (toRefPtrWillBeMemberNativeArray<TestInterfaceWillBeGarbageCollected, V8TestInterfaceWillBeGarbageCollected>(info[0], 1, info.GetIsolate())));
+    }
     impl->voidMethodTestInterfaceWillBeGarbageCollectedArrayArg(testInterfaceWillBeGarbageCollectedArrayArg);
 }
 
 static void voidMethodTestInterfaceWillBeGarbageCollectedArrayArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectV8Internal::voidMethodTestInterfaceWillBeGarbageCollectedArrayArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
@@ skipping 504 matching lines @@
     fromInternalPointer(object)->deref();
 }
 
 template<>
 v8::Handle<v8::Value> toV8NoInline(TestObject* impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
 {
     return toV8(impl, creationContext, isolate);
 }
 
 } // namespace WebCore