Make WebTaskRunner ThreadSafeRefCounted

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 581 matching lines @@
 static std::unique_ptr<WebGraphicsContext3DProvider>
 createContextProviderOnWorkerThread(
     Platform::ContextAttributes contextAttributes,
     Platform::GraphicsInfo* glInfo,
     const KURL& url) {
   WaitableEvent waitableEvent;
   ContextProviderCreationInfo creationInfo;
   creationInfo.contextAttributes = contextAttributes;
   creationInfo.glInfo = glInfo;
   creationInfo.url = url;
-  WebTaskRunner* taskRunner =
+  RefPtr<WebTaskRunner> taskRunner =
       Platform::current()->mainThread()->getWebTaskRunner();
   taskRunner->postTask(BLINK_FROM_HERE,
                        crossThreadBind(&createContextProviderOnMainThread,
                                        crossThreadUnretained(&creationInfo),
                                        crossThreadUnretained(&waitableEvent)));
   waitableEvent.wait();
   return std::move(creationInfo.createdContextProvider);
 }
 
 std::unique_ptr<WebGraphicsContext3DProvider>
@@ skipping 7130 matching lines @@
 
 void WebGLRenderingContextBase::getHTMLOrOffscreenCanvas(
     HTMLCanvasElementOrOffscreenCanvas& result) const {
   if (canvas())
     result.setHTMLCanvasElement(canvas());
   else
     result.setOffscreenCanvas(getOffscreenCanvas());
 }
 
 }  // namespace blink