Enable ThreadRestrictionVerifier for StringImpl

third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp

 /*
  * Copyright (C) 2009 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 567 matching lines @@
   // Outputs.
   std::unique_ptr<WebGraphicsContext3DProvider> createdContextProvider;
 };
 
 static void createContextProviderOnMainThread(
     ContextProviderCreationInfo* creationInfo,
     WaitableEvent* waitableEvent) {
   ASSERT(isMainThread());
   creationInfo->createdContextProvider = WTF::wrapUnique(
       Platform::current()->createOffscreenGraphicsContext3DProvider(
-          creationInfo->contextAttributes, creationInfo->url, 0,
+          creationInfo->contextAttributes, creationInfo->url.copy(), 0,
           creationInfo->glInfo));
   waitableEvent->signal();
 }
 
 static std::unique_ptr<WebGraphicsContext3DProvider>
 createContextProviderOnWorkerThread(
     Platform::ContextAttributes contextAttributes,
     Platform::GraphicsInfo* glInfo,
     const KURL& url) {
   WaitableEvent waitableEvent;
@@ skipping 7196 matching lines @@
 
 void WebGLRenderingContextBase::getHTMLOrOffscreenCanvas(
     HTMLCanvasElementOrOffscreenCanvas& result) const {
   if (canvas())
     result.setHTMLCanvasElement(canvas());
   else
     result.setOffscreenCanvas(offscreenCanvas());
 }
 
 }  // namespace blink