Improve handling of failed integer type conversions.

Source/bindings/tests/results/V8TestEventTarget.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 56 matching lines @@
 
 namespace WebCore {
 const WrapperTypeInfo V8TestEventTarget::wrapperTypeInfo = { gin::kEmbedderBlink, V8TestEventTarget::domTemplate, V8TestEventTarget::derefObject, 0, V8TestEventTarget::toEventTarget, 0, V8TestEventTarget::installPerContextEnabledMethods, &V8EventTarget::wrapperTypeInfo, WrapperTypeObjectPrototype };
 
 namespace TestEventTargetV8Internal {
 
 template <typename T> void V8_USE(T) { }
 
 static void itemMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
+    ExceptionState exceptionState(ExceptionState::ExecutionContext, "item", "TestEventTarget", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
-        throwTypeError(ExceptionMessages::failedToExecute("item", "TestEventTarget", ExceptionMessages::notEnoughArguments(1, info.Length())), info.GetIsolate());
+        exceptionState.throwTypeError(ExceptionMessages::notEnoughArguments(1, info.Length()));
+        exceptionState.throwIfNeeded();
         return;
     }
     TestEventTarget* imp = V8TestEventTarget::toNative(info.Holder());
-    V8TRYCATCH_VOID(unsigned, index, toUInt32(info[0]));
+    V8TRYCATCH_EXCEPTION_VOID(unsigned, index, toUInt32(info[0], exceptionState), exceptionState);
     v8SetReturnValue(info, imp->item(index));
 }
 
 static void itemMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestEventTargetV8Internal::itemMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "Execution");
 }
 
@@ skipping 260 matching lines @@
     fromInternalPointer(object)->deref();
 }
 
 template<>
 v8::Handle<v8::Value> toV8NoInline(TestEventTarget* impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
 {
     return toV8(impl, creationContext, isolate);
 }
 
 } // namespace WebCore