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

Source/bindings/tests/results/V8TestInterfaceConstructor2.cpp

Index: Source/bindings/tests/results/V8TestInterfaceConstructor2.cpp
diff --git a/Source/bindings/tests/results/V8TestInterfaceConstructor2.cpp b/Source/bindings/tests/results/V8TestInterfaceConstructor2.cpp
index 529c5c706fc88f45fe590bccd65f8ed8d788a567..f19bb6128d312f86808a44c74c6c13afb2f8489b 100644
--- a/Source/bindings/tests/results/V8TestInterfaceConstructor2.cpp
+++ b/Source/bindings/tests/results/V8TestInterfaceConstructor2.cpp
@@ -48,7 +48,11 @@ template <typename T> void V8_USE(T) { }
 static void constructor1(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     v8::Isolate* isolate = info.GetIsolate();
-    TOSTRING_VOID(V8StringResource<>, stringArg, info[0]);
+    V8StringResource<> stringArg;
+    {
+        v8::TryCatch block;
+        TOSTRING_VOID_NO_DECL(stringArg, info[0]);
+    }
     RefPtr<TestInterfaceConstructor2> impl = TestInterfaceConstructor2::create(stringArg);
 
     v8::Handle<v8::Object> wrapper = info.Holder();
@@ -60,24 +64,33 @@ static void constructor2(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     v8::Isolate* isolate = info.GetIsolate();
     ExceptionState exceptionState(ExceptionState::ConstructionContext, "TestInterfaceConstructor2", info.Holder(), isolate);
-    TONATIVE_VOID(TestInterfaceEmpty*, testInterfaceEmptyArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
-    TONATIVE_VOID_EXCEPTIONSTATE(int, longArg, toInt32(info[1], exceptionState), exceptionState);
-    TOSTRING_VOID(V8StringResource<>, defaultUndefinedOptionalStringArg, info[2]);
-    TOSTRING_VOID(V8StringResource<>, defaultNullStringOptionalStringArg, argumentOrNull(info, 3));
-    TONATIVE_VOID(Dictionary, defaultUndefinedOptionalDictionaryArg, Dictionary(info[4], info.GetIsolate()));
-    if (!defaultUndefinedOptionalDictionaryArg.isUndefinedOrNull() && !defaultUndefinedOptionalDictionaryArg.isObject()) {
-        exceptionState.throwTypeError("parameter 5 ('defaultUndefinedOptionalDictionaryArg') is not an object.");
-        exceptionState.throwIfNeeded();
-        return;
-    }
-    if (UNLIKELY(info.Length() <= 5)) {
-        RefPtr<TestInterfaceConstructor2> impl = TestInterfaceConstructor2::create(testInterfaceEmptyArg, longArg, defaultUndefinedOptionalStringArg, defaultNullStringOptionalStringArg, defaultUndefinedOptionalDictionaryArg);
-        v8::Handle<v8::Object> wrapper = info.Holder();
-        V8DOMWrapper::associateObjectWithWrapper<V8TestInterfaceConstructor2>(impl.release(), &V8TestInterfaceConstructor2::wrapperTypeInfo, wrapper, isolate, WrapperConfiguration::Independent);
-        v8SetReturnValue(info, wrapper);
-        return;
+    TestInterfaceEmpty* testInterfaceEmptyArg;
+    int longArg;
+    V8StringResource<> defaultUndefinedOptionalStringArg;
+    V8StringResource<> defaultNullStringOptionalStringArg;
+    Dictionary defaultUndefinedOptionalDictionaryArg;
+    V8StringResource<> optionalStringArg;
+    {
+        v8::TryCatch block;
+        TONATIVE_VOID_NO_DECL(testInterfaceEmptyArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
+        TONATIVE_VOID_EXCEPTIONSTATE_NO_DECL(longArg, toInt32(info[1], exceptionState), exceptionState);
+        TOSTRING_VOID_NO_DECL(defaultUndefinedOptionalStringArg, info[2]);
+        TOSTRING_VOID_NO_DECL(defaultNullStringOptionalStringArg, argumentOrNull(info, 3));
+        TONATIVE_VOID_NO_DECL(defaultUndefinedOptionalDictionaryArg, Dictionary(info[4], info.GetIsolate()));
+        if (!defaultUndefinedOptionalDictionaryArg.isUndefinedOrNull() && !defaultUndefinedOptionalDictionaryArg.isObject()) {
+            exceptionState.throwTypeError("parameter 5 ('defaultUndefinedOptionalDictionaryArg') is not an object.");
+            exceptionState.throwIfNeeded();
+            return;
+        }
+        if (UNLIKELY(info.Length() <= 5)) {
+            RefPtr<TestInterfaceConstructor2> impl = TestInterfaceConstructor2::create(testInterfaceEmptyArg, longArg, defaultUndefinedOptionalStringArg, defaultNullStringOptionalStringArg, defaultUndefinedOptionalDictionaryArg);
+            v8::Handle<v8::Object> wrapper = info.Holder();
+            V8DOMWrapper::associateObjectWithWrapper<V8TestInterfaceConstructor2>(impl.release(), &V8TestInterfaceConstructor2::wrapperTypeInfo, wrapper, isolate, WrapperConfiguration::Independent);
+            v8SetReturnValue(info, wrapper);
+            return;
+        }
+        TOSTRING_VOID_NO_DECL(optionalStringArg, info[5]);
     }
-    TOSTRING_VOID(V8StringResource<>, optionalStringArg, info[5]);
     RefPtr<TestInterfaceConstructor2> impl = TestInterfaceConstructor2::create(testInterfaceEmptyArg, longArg, defaultUndefinedOptionalStringArg, defaultNullStringOptionalStringArg, defaultUndefinedOptionalDictionaryArg, optionalStringArg);
 
     v8::Handle<v8::Object> wrapper = info.Holder();