Replace AllowCrossThreadAccess() + non-GCed pointers with crossThreadUnretained()

third_party/WebKit/Source/core/imagebitmap/ImageBitmapFactories.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 203 matching lines @@
 void ImageBitmapFactories::ImageBitmapLoader::scheduleAsyncImageBitmapDecoding(DOMArrayBuffer* arrayBuffer)
 {
     // For a 4000*4000 png image where each 10*10 tile is filled in by a random RGBA value,
     // the byteLength is around 2M, and it typically takes around 4.5ms to decode on a
     // current model of Linux desktop.
     const int longTaskByteLengthThreshold = 2000000;
     BackgroundTaskRunner::TaskSize taskSize = BackgroundTaskRunner::TaskSizeShortRunningTask;
     if (arrayBuffer->byteLength() >= longTaskByteLengthThreshold)
         taskSize = BackgroundTaskRunner::TaskSizeLongRunningTask;
     WebTaskRunner* taskRunner = Platform::current()->currentThread()->getWebTaskRunner();
-    BackgroundTaskRunner::postOnBackgroundThread(BLINK_FROM_HERE, threadSafeBind(&ImageBitmapFactories::ImageBitmapLoader::decodeImageOnDecoderThread, wrapCrossThreadPersistent(this), AllowCrossThreadAccess(taskRunner), wrapCrossThreadPersistent(arrayBuffer)), taskSize);
+    BackgroundTaskRunner::postOnBackgroundThread(BLINK_FROM_HERE, threadSafeBind(&ImageBitmapFactories::ImageBitmapLoader::decodeImageOnDecoderThread, wrapCrossThreadPersistent(this), crossThreadUnretained(taskRunner), wrapCrossThreadPersistent(arrayBuffer)), taskSize);
 }
 
 void ImageBitmapFactories::ImageBitmapLoader::decodeImageOnDecoderThread(WebTaskRunner* taskRunner, DOMArrayBuffer* arrayBuffer)
 {
     ASSERT(!isMainThread());
     RefPtr<SharedBuffer> sharedBuffer = SharedBuffer::create(static_cast<char*>(arrayBuffer->data()), static_cast<size_t>(arrayBuffer->byteLength()));
 
     ImageDecoder::AlphaOption alphaOp = ImageDecoder::AlphaPremultiplied;
     if (m_options.premultiplyAlpha() == "none")
         alphaOp = ImageDecoder::AlphaNotPremultiplied;
@@ skipping 34 matching lines @@
     m_factory->didFinishLoading(this);
 }
 
 DEFINE_TRACE(ImageBitmapFactories::ImageBitmapLoader)
 {
     visitor->trace(m_factory);
     visitor->trace(m_resolver);
 }
 
 } // namespace blink