Remove calls to HandleScope default ctor.

Source/bindings/v8/custom/V8PromiseCustom.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 113 matching lines @@
 
     ScriptState* state = 0;
     if (context->isDocument()) {
         state = mainWorldScriptState(static_cast<Document*>(context)->frame());
     } else {
         ASSERT(context->isWorkerGlobalScope());
         state = scriptStateFromWorkerGlobalScope(toWorkerGlobalScope(context));
     }
     ASSERT(state);
 
-    v8::HandleScope handleScope;
+    v8::Isolate* isolate = state->isolate();
+    v8::HandleScope handleScope(isolate);
     v8::Handle<v8::Context> v8Context = state->context();
     v8::Context::Scope scope(v8Context);
-    v8::Isolate* isolate = v8Context->GetIsolate();
     v8::Handle<v8::Value> args[] = { m_result.newLocal(isolate) };
     V8ScriptRunner::callFunction(m_callback.newLocal(isolate), context, m_receiver.newLocal(isolate), WTF_ARRAY_LENGTH(args), args);
 };
 
 v8::Handle<v8::Value> postTask(v8::Handle<v8::Function> callback, v8::Handle<v8::Object> receiver, v8::Handle<v8::Value> value, v8::Isolate* isolate)
 {
     ScriptExecutionContext* scriptExecutionContext = getScriptExecutionContext();
     ASSERT(scriptExecutionContext && scriptExecutionContext->isContextThread());
     scriptExecutionContext->postTask(adoptPtr(new PromiseTask(callback, receiver, value)));
     return v8::Undefined(isolate);
@@ skipping 490 matching lines @@
         v8::TryCatch trycatch;
         v8::Handle<v8::Value> args[] = { result };
         V8ScriptRunner::callFunction(function, getScriptExecutionContext(), receiver, WTF_ARRAY_LENGTH(args), args);
     } else {
         ASSERT(mode == Asynchronous);
         postTask(function, receiver, result, isolate);
     }
 }
 
 } // namespace WebCore