Move MessageLoop TaskQueues to pointers.

base/message_loop.h

Index: base/message_loop.h
diff --git a/base/message_loop.h b/base/message_loop.h
index 395ce6ed31d20ef0a54a608eba293740f744cfe5..ea172900a7025b3292de67651bee343d4cd7e202 100644
--- a/base/message_loop.h
+++ b/base/message_loop.h
@@ -365,7 +365,7 @@ class MessageLoop : public base::MessagePump::Delegate {
 
   // A list of tasks that need to be processed by this instance.  Note that
   // this queue is only accessed (push/pop) by our current thread.
-  TaskQueue work_queue_;
+  scoped_ptr<TaskQueue> work_queue_;
 
   // Contains delayed tasks, sorted by their 'delayed_run_time' property.
   DelayedTaskQueue delayed_work_queue_;
@@ -393,7 +393,7 @@ class MessageLoop : public base::MessagePump::Delegate {
   // aquired under a mutex for processing on this instance's thread. These tasks
   // have not yet been sorted out into items for our work_queue_ vs items that
   // will be handled by the TimerManager.
-  TaskQueue incoming_queue_;
+  scoped_ptr<TaskQueue> incoming_queue_;
   // Protect access to incoming_queue_.
   Lock incoming_queue_lock_;