Fix V8 callback binding for "CallWith=ThisValue" attribute.

Source/bindings/tests/results/V8TestCallbackInterface.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 "V8TestCallbackInterface.h"
 
 #include "bindings/tests/v8/V8TestInterfaceEmpty.h"
@@ skipping 168 matching lines @@
     if (m_scriptState->contextIsEmpty())
         return;
 
     ScriptState::Scope scope(m_scriptState.get());
     v8::Handle<v8::Value> thisHandle = thisValue.v8Value();
     if (thisHandle.IsEmpty()) {
         if (!isScriptControllerTerminating())
             CRASH();
         return;
     }
-    ASSERT(thisHandle->IsObject());
     v8::Handle<v8::Value> stringArgHandle = v8String(isolate, stringArg);
     if (stringArgHandle.IsEmpty()) {
         if (!isScriptControllerTerminating())
             CRASH();
         return;
     }
     v8::Handle<v8::Value> argv[] = { stringArgHandle };
 
-    invokeCallback(m_scriptState.get(), m_callback.newLocal(isolate), v8::Handle<v8::Object>::Cast(thisHandle), 1, argv);
+    invokeCallback(m_scriptState.get(), m_callback.newLocal(isolate), thisHandle, 1, argv);
 }
 
 void V8TestCallbackInterface::voidMethodWillBeGarbageCollectedSequenceArg(const WillBeHeapVector<RefPtrWillBeMember<TestInterfaceWillBeGarbageCollected> >& sequenceArg)
 {
     if (!canInvokeCallback())
         return;
 
     v8::Isolate* isolate = m_scriptState->isolate();
     if (m_scriptState->contextIsEmpty())
         return;
@@ skipping 25 matching lines @@
         if (!isScriptControllerTerminating())
             CRASH();
         return;
     }
     v8::Handle<v8::Value> argv[] = { arrayArgHandle };
 
     invokeCallback(m_scriptState.get(), m_callback.newLocal(isolate), 1, argv);
 }
 
 } // namespace WebCore