Replace threadSafeBind() + GCed pointers with CrossThreadPersistent

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

 /*
  * Copyright (C) 2010, 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 781 matching lines @@
                 continue;
             if (handler == &node->handler()) {
                 handler->breakConnection();
                 m_finishedSourceNodes.add(node);
                 didRemove = true;
                 break;
             }
         }
     }
     if (didRemove)
-        Platform::current()->mainThread()->getWebTaskRunner()->postTask(BLINK_FROM_HERE, threadSafeBind(&AbstractAudioContext::removeFinishedSourceNodes, this));
+        Platform::current()->mainThread()->getWebTaskRunner()->postTask(BLINK_FROM_HERE, threadSafeBind(&AbstractAudioContext::removeFinishedSourceNodes, wrapCrossThreadPersistent(this)));
 
     m_finishedSourceHandlers.clear();
 }
 
 void AbstractAudioContext::notifySourceNodeStartedProcessing(AudioNode* node)
 {
     ASSERT(isMainThread());
     AutoLocker locker(this);
 
     m_activeSourceNodes.append(node);
@@ skipping 89 matching lines @@
 {
     // This runs inside the AbstractAudioContext's lock when handling pre-render tasks.
     ASSERT(isAudioThread());
     ASSERT(isGraphOwner());
 
     // Resolve any pending promises created by resume(). Only do this if we haven't already started
     // resolving these promises. This gets called very often and it takes some time to resolve the
     // promises in the main thread.
     if (!m_isResolvingResumePromises && m_resumeResolvers.size() > 0) {
         m_isResolvingResumePromises = true;
-        Platform::current()->mainThread()->getWebTaskRunner()->postTask(BLINK_FROM_HERE, threadSafeBind(&AbstractAudioContext::resolvePromisesForResumeOnMainThread, this));
+        Platform::current()->mainThread()->getWebTaskRunner()->postTask(BLINK_FROM_HERE, threadSafeBind(&AbstractAudioContext::resolvePromisesForResumeOnMainThread, wrapCrossThreadPersistent(this)));
     }
 }
 
 void AbstractAudioContext::rejectPendingDecodeAudioDataResolvers()
 {
     // Now reject any pending decodeAudioData resolvers
     for (auto& resolver : m_decodeAudioResolvers)
         resolver->reject(DOMException::create(InvalidStateError, "Audio context is going away"));
     m_decodeAudioResolvers.clear();
 }
@@ skipping 53 matching lines @@
 
 SecurityOrigin* AbstractAudioContext::getSecurityOrigin() const
 {
     if (getExecutionContext())
         return getExecutionContext()->getSecurityOrigin();
 
     return nullptr;
 }
 
 } // namespace blink