Make WebTaskRunner ThreadSafeRefCounted

third_party/WebKit/Source/platform/graphics/AcceleratedStaticBitmapImage.cpp

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "platform/graphics/AcceleratedStaticBitmapImage.h"
 
 #include "gpu/command_buffer/client/gles2_interface.h"
 #include "gpu/command_buffer/common/sync_token.h"
 #include "platform/graphics/MailboxTextureHolder.h"
 #include "platform/graphics/SkiaTextureHolder.h"
@@ skipping 143 matching lines @@
   ensureMailbox();
   // If |m_textureThreadTaskRunner| in TextureHolder is set, it means that
   // the |m_texture| in this class has been consumed on the current thread,
   // which may happen when we have chained transfers. When that is the case,
   // we must not reset |m_imageThreadTaskRunner|, so we ensure that
   // releaseImage() or releaseTexture() is called on the right thread.
   if (!m_textureHolder->wasTransferred()) {
     WebThread* currentThread = Platform::current()->currentThread();
     m_textureHolder->setWasTransferred(true);
     m_textureHolder->setTextureThreadTaskRunner(
-        currentThread->getWebTaskRunner()->clone());
+        currentThread->getWebTaskRunner());
   }
   m_detachThreadAtNextCheck = true;
 }
 
 bool AcceleratedStaticBitmapImage::currentFrameKnownToBeOpaque(
     MetadataMode metadataMode) {
   return m_textureHolder->currentFrameKnownToBeOpaque(metadataMode);
 }
 
 void AcceleratedStaticBitmapImage::checkThread() {
   if (m_detachThreadAtNextCheck) {
     m_threadChecker.DetachFromThread();
     m_detachThreadAtNextCheck = false;
   }
   CHECK(m_threadChecker.CalledOnValidThread());
 }
 
 }  // namespace blink