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

Source/bindings/tests/results/V8TestInterfaceWillBeGarbageCollected.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 "V8TestInterfaceWillBeGarbageCollected.h"
 
 #include "RuntimeEnabledFeatures.h"
@@ skipping 61 matching lines @@
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void funcMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwMinimumArityTypeErrorForMethod("func", "TestInterfaceWillBeGarbageCollected", 1, info.Length(), info.GetIsolate());
         return;
     }
     TestInterfaceWillBeGarbageCollected* impl = V8TestInterfaceWillBeGarbageCollected::toNative(info.Holder());
-    TONATIVE_VOID(TestInterfaceWillBeGarbageCollected*, arg, V8TestInterfaceWillBeGarbageCollected::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
+    TestInterfaceWillBeGarbageCollected* arg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_INTERNAL(arg, V8TestInterfaceWillBeGarbageCollected::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
+    }
     impl->func(arg);
 }
 
 static void funcMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestInterfaceWillBeGarbageCollectedV8Internal::funcMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void constructor(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     v8::Isolate* isolate = info.GetIsolate();
     if (UNLIKELY(info.Length() < 1)) {
         throwMinimumArityTypeErrorForConstructor("TestInterfaceWillBeGarbageCollected", 1, info.Length(), info.GetIsolate());
         return;
     }
-    TOSTRING_VOID(V8StringResource<>, str, info[0]);
+    V8StringResource<> str;
+    {
+        TOSTRING_VOID_INTERNAL(str, info[0]);
+    }
     RefPtrWillBeRawPtr<TestInterfaceWillBeGarbageCollected> impl = TestInterfaceWillBeGarbageCollected::create(str);
 
     v8::Handle<v8::Object> wrapper = info.Holder();
     V8DOMWrapper::associateObjectWithWrapper<V8TestInterfaceWillBeGarbageCollected>(impl.release(), &V8TestInterfaceWillBeGarbageCollected::wrapperTypeInfo, wrapper, isolate, WrapperConfiguration::Independent);
     v8SetReturnValue(info, wrapper);
 }
 
 } // namespace TestInterfaceWillBeGarbageCollectedV8Internal
 
 static const V8DOMConfiguration::AttributeConfiguration V8TestInterfaceWillBeGarbageCollectedAttributes[] = {
@@ skipping 100 matching lines @@
 #endif // !ENABLE(OILPAN)
 }
 
 template<>
 v8::Handle<v8::Value> toV8NoInline(TestInterfaceWillBeGarbageCollected* impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
 {
     return toV8(impl, creationContext, isolate);
 }
 
 } // namespace WebCore