A quick fix for Bug 64463....

base/message_loop_proxy_impl.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_IMPL_H_
 #define BASE_MESSAGE_LOOP_PROXY_IMPL_H_
 #pragma once
 
 #include "base/lock.h"
 #include "base/message_loop.h"
 #include "base/message_loop_proxy.h"
 
 namespace base {
 
 // A stock implementation of MessageLoopProxy that takes in a MessageLoop
 // and keeps track of its lifetime using the MessageLoop DestructionObserver.
 // For now a MessageLoopProxyImpl can only be created for the current thread.
 class MessageLoopProxyImpl : public MessageLoopProxy,
                              public MessageLoop::DestructionObserver {
  public:
-  ~MessageLoopProxyImpl();
+  virtual ~MessageLoopProxyImpl();
 
   // MessageLoopProxy implementation
   virtual bool PostTask(const tracked_objects::Location& from_here,
                         Task* task);
   virtual bool PostDelayedTask(const tracked_objects::Location& from_here,
                                Task* task, int64 delay_ms);
   virtual bool PostNonNestableTask(const tracked_objects::Location& from_here,
                                    Task* task);
   virtual bool PostNonNestableDelayedTask(
       const tracked_objects::Location& from_here,
@@ skipping 21 matching lines @@
   mutable Lock message_loop_lock_;
   MessageLoop* target_message_loop_;
 
   DISALLOW_COPY_AND_ASSIGN(MessageLoopProxyImpl);
 };
 
 }  // namespace base
 
 #endif  // BASE_MESSAGE_LOOP_PROXY_IMPL_H_