Track webcore worker message loops in chromium.

content/common/child_thread.h

Index: content/common/child_thread.h
diff --git a/content/common/child_thread.h b/content/common/child_thread.h
index acb1e3ab4781dd23cdeea83afbca6489fa032bd2..ab1c0698cf02919706f232595160dfef04d4d685 100644
--- a/content/common/child_thread.h
+++ b/content/common/child_thread.h
@@ -7,6 +7,7 @@
 #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"
@@ -18,6 +19,7 @@ class MessageLoop;
 class QuotaDispatcher;
 class ResourceDispatcher;
 class SocketStreamDispatcher;
+class WorkerTaskRunner;
 
 namespace IPC {
 class SyncChannel;
@@ -79,6 +81,8 @@ class CONTENT_EXPORT ChildThread : public IPC::Channel::Listener,
   // Returns the one child thread.
   static ChildThread* current();
 
+  WorkerTaskRunner* worker_task_runner() const;
+
  protected:
   friend class ChildProcess;
 
@@ -140,6 +144,10 @@ class CONTENT_EXPORT ChildThread : public IPC::Channel::Listener,
 
   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);
 };