Fix WeakPtrFactory member placement in ipc

ipc/mojo/ipc_channel_mojo_host.h

 // Copyright 2014 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 IPC_IPC_CHANNEL_MOJO_HOST_H_
 #define IPC_IPC_CHANNEL_MOJO_HOST_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/process/process_handle.h"
@@ skipping 21 matching lines @@
  private:
   class ChannelDelegate;
 
   // Delegate talks to ChannelMojo, whch lives in IO thread, thus
   // the Delegate should also live and dies in the IO thread as well.
   class DelegateDeleter {
    public:
     void operator()(ChannelDelegate* ptr) const;
   };
 
-  base::WeakPtrFactory<ChannelMojoHost> weak_factory_;
   const scoped_refptr<base::TaskRunner> io_task_runner_;
   scoped_ptr<ChannelDelegate, DelegateDeleter> channel_delegate_;
+  base::WeakPtrFactory<ChannelMojoHost> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ChannelMojoHost);
 };
 
 }  // namespace IPC
 
 #endif  // IPC_IPC_CHANNEL_MOJO_HOST_H_