Track webcore worker message loops in chromium.

content/common/child_thread.h

 // Copyright (c) 2011 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.
 
 #ifndef CONTENT_COMMON_CHILD_THREAD_H_
 #define CONTENT_COMMON_CHILD_THREAD_H_
 #pragma once
 
 #include "base/basictypes.h"
+#include "base/lazy_instance.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/shared_memory.h"
 #include "content/common/content_export.h"
 #include "content/common/message_router.h"
 #include "webkit/glue/resource_loader_bridge.h"
 
 class FileSystemDispatcher;
 class MessageLoop;
 class QuotaDispatcher;
 class ResourceDispatcher;
 class SocketStreamDispatcher;
+class WorkerTaskRunner;
 
 namespace IPC {
 class SyncChannel;
 class SyncMessageFilter;
 }
 
 // The main thread of a child process derives from this class.
 class CONTENT_EXPORT ChildThread : public IPC::Channel::Listener,
                                    public IPC::Message::Sender {
  public:
@@ skipping 41 matching lines @@
 
   // Safe to call on any thread, as long as it's guaranteed that the thread's
   // lifetime is less than the main thread.
   IPC::SyncMessageFilter* sync_message_filter();
 
   MessageLoop* message_loop();
 
   // Returns the one child thread.
   static ChildThread* current();
 
+  WorkerTaskRunner* worker_task_runner() const;
+
  protected:
   friend class ChildProcess;
 
   // Called when the process refcount is 0.
   void OnProcessFinalRelease();
 
   virtual bool OnControlMessageReceived(const IPC::Message& msg);
   virtual void OnAskBeforeShutdown();
   virtual void OnShutdown();
 
@@ skipping 41 matching lines @@
   // The OnChannelError() callback was invoked - the channel is dead, don't
   // attempt to communicate.
   bool on_channel_error_called_;
 
   MessageLoop* message_loop_;
 
   scoped_ptr<FileSystemDispatcher> file_system_dispatcher_;
 
   scoped_ptr<QuotaDispatcher> quota_dispatcher_;
 
+  static base::LazyInstance<WorkerTaskRunner,

[dgrogan, 2011/12/07 22:47:39]

I don't think this needs to be static, but LazyInstance doesn't construct
WorkerTaskRunner in the utility process otherwise.

[michaeln, 2011/12/07 23:57:38]

LazyInstances are pretty much always static. They're used to create lazily
initialized globals that are never deleted (the leaky part).

+      base::LeakyLazyInstanceTraits<WorkerTaskRunner> >
+      worker_task_runner_;
+
   DISALLOW_COPY_AND_ASSIGN(ChildThread);
 };
 
 #endif  // CONTENT_COMMON_CHILD_THREAD_H_