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

base/message_loop_proxy.h

 // Copyright (c) 2010 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_MESSAGE_LOOP_PROXY_H_
 #define BASE_MESSAGE_LOOP_PROXY_H_
 
 #include "base/basictypes.h"
 #include "base/ref_counted.h"
 #include "base/task.h"
 
+namespace base {
+
+struct MessageLoopProxyTraits;
+
 // This class provides a thread-safe refcounted interface to the Post* methods
 // of a message loop. This class can outlive the target message loop.
-class MessageLoopProxy : public base::RefCountedThreadSafe<MessageLoopProxy> {
+class MessageLoopProxy
+    : public base::RefCountedThreadSafe<MessageLoopProxy,
+                                        MessageLoopProxyTraits> {
  public:
   // These are the same methods in message_loop.h, but are guaranteed to either
   // get posted to the MessageLoop if it's still alive, or be deleted otherwise.
   // They return true iff the thread existed and the task was posted.  Note that
   // even if the task is posted, there's no guarantee that it will run, since
   // the target thread may already have a Quit message in its queue.
   virtual bool PostTask(const tracked_objects::Location& from_here,
                         Task* task) = 0;
   virtual bool PostDelayedTask(const tracked_objects::Location& from_here,
                                Task* task, int64 delay_ms) = 0;
@@ skipping 10 matching lines @@
   template <class T>
   bool DeleteSoon(const tracked_objects::Location& from_here,
                   T* object) {
     return PostNonNestableTask(from_here, new DeleteTask<T>(object));
   }
   template <class T>
   bool ReleaseSoon(const tracked_objects::Location& from_here,
                    T* object) {
     return PostNonNestableTask(from_here, new ReleaseTask<T>(object));
   }
+
+  // Factory method for creating an implementation of MessageLoopProxy
+  // for the current thread.
+  static scoped_refptr<MessageLoopProxy> CreateForCurrentThread();
+
+ protected:
+  friend struct MessageLoopProxyTraits;
+  // Called when the proxy is about to be deleted. Subclasses can override this
+  // to provide deletion on specific threads.
+  virtual void OnDestruct() {
+    delete this;
+  }
 };
 
+struct MessageLoopProxyTraits {
+  static void Destruct(MessageLoopProxy* proxy) {
+    proxy->OnDestruct();
+  }
+};
+
+}  // namespace base
+
 #endif  // BASE_MESSAGE_LOOP_PROXY_H_