AtomicString usage improvements in v8 interceptors.

third_party/WebKit/WebCore/bindings/v8/custom/V8DOMWindowCustom.cpp

 /*
  * Copyright (C) 2009 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 518 matching lines @@
         return notHandledByInterceptor();
 
     v8::Handle<v8::Object> holder = V8Proxy::LookupDOMWrapper(V8ClassIndex::DOMWINDOW, info.This());
     if (holder.IsEmpty())
         return notHandledByInterceptor();
 
     DOMWindow* window = V8Proxy::ToNativeObject<DOMWindow>(V8ClassIndex::DOMWINDOW, holder);
     if (!window)
         return notHandledByInterceptor();
 
-    String propName = toWebCoreString(name);
-
     Frame* frame = window->frame();
     // window is detached from a frame.
     if (!frame)
         return notHandledByInterceptor();
 
+    AtomicString propName = v8StringToAtomicWebCoreString(name);
+
     // Search sub-frames.
     Frame* child = frame->tree()->child(propName);
     if (child)
         return V8Proxy::ToV8Object(V8ClassIndex::DOMWINDOW, child->domWindow());
 
     // Search IDL functions defined in the prototype
     v8::Handle<v8::Value> result = holder->GetRealNamedPropertyInPrototypeChain(name);
     if (!result.IsEmpty())
         return result;
 
@@ skipping 133 matching lines @@
 }
 
 CALLBACK_FUNC_DECL(DOMWindowClearInterval)
 {
     INC_STATS("DOM.DOMWindow.clearInterval");
     ClearTimeoutImpl(args);
     return v8::Undefined();
 }
 
 } // namespace WebCore