Avoid useless call to v8::Isolate::GetCurrent() in ScriptPromiseResolver

Source/bindings/v8/ScriptPromiseResolver.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 47 matching lines @@
     // to be in a v8 context.
 
     detachPromise();
     m_resolver.clear();
 }
 
 PassRefPtr<ScriptPromiseResolver> ScriptPromiseResolver::create(ScriptExecutionContext* context)
 {
     ASSERT(v8::Context::InContext());
     ASSERT(context);
-    v8::Isolate* isolate = v8::Isolate::GetCurrent();
-    return adoptRef(new ScriptPromiseResolver(toV8Context(context, DOMWrapperWorld::current())->Global(), isolate));
+    return adoptRef(new ScriptPromiseResolver(toV8Context(context, DOMWrapperWorld::current())->Global(), toIsolate(context)));
 }
 
 PassRefPtr<ScriptPromiseResolver> ScriptPromiseResolver::create()
 {
     ASSERT(v8::Context::InContext());
     v8::Isolate* isolate = v8::Isolate::GetCurrent();
     return adoptRef(new ScriptPromiseResolver(v8::Object::New(), isolate));
 }
 
 bool ScriptPromiseResolver::isPending() const
@@ skipping 62 matching lines @@
         return false;
     v8::Local<v8::Object> resolver = m_resolver.newLocal(m_isolate);
     if (V8PromiseCustom::isInternalDetached(resolver))
         return false;
     v8::Local<v8::Object> internal = V8PromiseCustom::getInternal(resolver);
     V8PromiseCustom::PromiseState state = V8PromiseCustom::getState(internal);
     return state == V8PromiseCustom::Pending;
 }
 
 } // namespace WebCore