Created a stock implementation of the MessageLoopProxy interface than can be ...

base/thread.h

 // Copyright (c) 2006-2009 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 BASE_THREAD_H_
 #define BASE_THREAD_H_
 
 #include <string>
 
 #include "base/message_loop.h"
+#include "base/message_loop_proxy.h"
 #include "base/platform_thread.h"
 
 namespace base {
 
 // A simple thread abstraction that establishes a MessageLoop on a new thread.
 // The consumer uses the MessageLoop of the thread to cause code to execute on
 // the thread.  When this object is destroyed the thread is terminated.  All
 // pending tasks queued on the thread's message loop will run to completion
 // before the thread is terminated.
 //
@@ skipping 76 matching lines @@
   // Returns the message loop for this thread.  Use the MessageLoop's
   // PostTask methods to execute code on the thread.  This only returns
   // non-null after a successful call to Start.  After Stop has been called,
   // this will return NULL.
   //
   // NOTE: You must not call this MessageLoop's Quit method directly.  Use
   // the Thread's Stop method instead.
   //
   MessageLoop* message_loop() const { return message_loop_; }
 
+  // Returns a MessageLoopProxy for this thread.  Use the MessageLoopProxy's
+  // PostTask methods to execute code on the thread.  This only returns
+  // non-null after a successful call to Start. After Stop has been called,
+  // this will return NULL. Callers can hold on to this even after the thread
+  // is gone.
+  // TODO(sanjeevr): Look into merging MessageLoop and MessageLoopProxy.
+  scoped_refptr<MessageLoopProxy> message_loop_proxy() {
+    return message_loop_proxy_;
+  }
+
   // Set the name of this thread (for display in debugger too).
   const std::string &thread_name() { return name_; }
 
   // The native thread handle.
   PlatformThreadHandle thread_handle() { return thread_; }
 
   // The thread ID.
   PlatformThreadId thread_id() const { return thread_id_; }
 
   // Returns true if the thread has been started, and not yet stopped.
@@ skipping 38 matching lines @@
   struct StartupData;
   StartupData* startup_data_;
 
   // The thread's handle.
   PlatformThreadHandle thread_;
 
   // The thread's message loop.  Valid only while the thread is alive.  Set
   // by the created thread.
   MessageLoop* message_loop_;
 
+  // A MessageLoopProxy implementation that targets this thread. This can
+  // outlive the thread.
+  scoped_refptr<MessageLoopProxy> message_loop_proxy_;
+
   // Our thread's ID.
   PlatformThreadId thread_id_;
 
   // The name of the thread.  Used for debugging purposes.
   std::string name_;
 
   friend class ThreadQuitTask;
 
   DISALLOW_COPY_AND_ASSIGN(Thread);
 };
 
 }  // namespace base
 
 #endif  // BASE_THREAD_H_