Replace AllowCrossThreadAccess() + ThreadSafeRefCounted pointers with PassRefPtr

third_party/WebKit/Source/modules/webaudio/MediaElementAudioSourceNode.cpp

 /*
  * Copyright (C) 2011, 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:
  * 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 159 matching lines @@
             provider.provideInput(outputBus, numberOfFrames);
         }
         // Output silence if we don't have access to the element.
         if (!passesCORSAccessCheck()) {
             if (m_maybePrintCORSMessage) {
                 // Print a CORS message, but just once for each change in the current media
                 // element source, and only if we have a document to print to.
                 m_maybePrintCORSMessage = false;
                 if (context()->getExecutionContext()) {
                     context()->getExecutionContext()->postTask(BLINK_FROM_HERE,
-                        createCrossThreadTask(&MediaElementAudioSourceHandler::printCORSMessage,
-                            AllowCrossThreadAccess(this),
-                            m_currentSrcString));
+                        createCrossThreadTask(&MediaElementAudioSourceHandler::printCORSMessage, PassRefPtr<MediaElementAudioSourceHandler>(this), m_currentSrcString));

[hiroshige, 2016/05/17 03:46:12]

I merged mulitiple lines into one here, just to avoid a presubmit error:
when I replaced a line
with a line
the presubmit script thinks it is a declaration of PassRefPtr as a local
variable (because it is PassRefPtr at the line head?) and reports an error.

Other workarounds might be:
- Introduce wrapPassRefPtr(), or
- Fix the presubmit script.

                 }
             }
             outputBus->zero();
         }
     } else {
         // We failed to acquire the lock.
         outputBus->zero();
     }
 }
 
@@ skipping 51 matching lines @@
     mediaElementAudioSourceHandler().lock();
 }
 
 void MediaElementAudioSourceNode::unlock()
 {
     mediaElementAudioSourceHandler().unlock();
 }
 
 } // namespace blink