Revert of Standardize usage of virtual/override/final in ipc/

ipc/ipc_channel_proxy.h

 // Copyright (c) 2012 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_PROXY_H_
 #define IPC_IPC_CHANNEL_PROXY_H_
 
 #include <vector>
 
 #include "base/memory/ref_counted.h"
@@ skipping 58 matching lines @@
       const IPC::ChannelHandle& channel_handle,
       Channel::Mode mode,
       Listener* listener,
       const scoped_refptr<base::SingleThreadTaskRunner>& ipc_task_runner);
 
   static scoped_ptr<ChannelProxy> Create(
       scoped_ptr<ChannelFactory> factory,
       Listener* listener,
       const scoped_refptr<base::SingleThreadTaskRunner>& ipc_task_runner);
 
-  ~ChannelProxy() override;
+  virtual ~ChannelProxy();
 
   // Initializes the channel proxy. Only call this once to initialize a channel
   // proxy that was not initialized in its constructor. If create_pipe_now is
   // true, the pipe is created synchronously. Otherwise it's created on the IO
   // thread.
   void Init(const IPC::ChannelHandle& channel_handle, Channel::Mode mode,
             bool create_pipe_now);
   void Init(scoped_ptr<ChannelFactory> factory, bool create_pipe_now);
 
   // Close the IPC::Channel.  This operation completes asynchronously, once the
   // background thread processes the command to close the channel.  It is ok to
   // call this method multiple times.  Redundant calls are ignored.
   //
   // WARNING: MessageFilter objects held by the ChannelProxy is also
   // released asynchronously, and it may in fact have its final reference
   // released on the background thread.  The caller should be careful to deal
   // with / allow for this possibility.
   void Close();
 
   // Send a message asynchronously.  The message is routed to the background
   // thread where it is passed to the IPC::Channel's Send method.
-  bool Send(Message* message) override;
+  virtual bool Send(Message* message) override;
 
   // Used to intercept messages as they are received on the background thread.
   //
   // Ordinarily, messages sent to the ChannelProxy are routed to the matching
   // listener on the worker thread.  This API allows code to intercept messages
   // before they are sent to the worker thread.
   // If you call this before the target process is launched, then you're
   // guaranteed to not miss any messages.  But if you call this anytime after,
   // then some messages might be missed since the filter is added internally on
   // the IO thread.
@@ skipping 33 matching lines @@
     base::SingleThreadTaskRunner* ipc_task_runner() const {
       return ipc_task_runner_.get();
     }
     const std::string& channel_id() const { return channel_id_; }
 
     // Dispatches a message on the listener thread.
     void OnDispatchMessage(const Message& message);
 
    protected:
     friend class base::RefCountedThreadSafe<Context>;
-    ~Context() override;
+    virtual ~Context();
 
     // IPC::Listener methods:
-    bool OnMessageReceived(const Message& message) override;
-    void OnChannelConnected(int32 peer_pid) override;
-    void OnChannelError() override;
+    virtual bool OnMessageReceived(const Message& message) override;
+    virtual void OnChannelConnected(int32 peer_pid) override;
+    virtual void OnChannelError() override;
 
     // Like OnMessageReceived but doesn't try the filters.
     bool OnMessageReceivedNoFilter(const Message& message);
 
     // Gives the filters a chance at processing |message|.
     // Returns true if the message was processed, false otherwise.
     bool TryFilters(const Message& message);
 
     // Like Open and Close, but called on the IPC thread.
     virtual void OnChannelOpened();
@@ skipping 61 matching lines @@
   // that involves this data.
   scoped_refptr<Context> context_;
 
   // Whether the channel has been initialized.
   bool did_init_;
 };
 
 }  // namespace IPC
 
 #endif  // IPC_IPC_CHANNEL_PROXY_H_