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

ipc/mojo/ipc_channel_mojo_readers.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_MOJO_IPC_CHANNEL_MOJO_READERS_H_
 #define IPC_MOJO_IPC_CHANNEL_MOJO_READERS_H_
 
 #include <vector>
 
 #include "base/macros.h"
@@ skipping 15 matching lines @@
 namespace internal {
 
 // A MessagePipeReader implementation for IPC::Message communication.
 class MessageReader : public MessagePipeReader {
  public:
   MessageReader(mojo::ScopedMessagePipeHandle pipe, ChannelMojo* owner);
 
   bool Send(scoped_ptr<Message> message);
 
   // MessagePipeReader implementation
-  void OnMessageReceived() override;
-  void OnPipeClosed() override;
-  void OnPipeError(MojoResult error) override;
+  virtual void OnMessageReceived() override;
+  virtual void OnPipeClosed() override;
+  virtual void OnPipeError(MojoResult error) override;
 
  private:
   ChannelMojo* owner_;
 
   DISALLOW_COPY_AND_ASSIGN(MessageReader);
 };
 
 // MessagePipeReader implementation for control messages.
 // Actual message handling is implemented by sublcasses.
 class ControlReader : public MessagePipeReader {
  public:
   ControlReader(mojo::ScopedMessagePipeHandle pipe, ChannelMojo* owner);
 
   virtual bool Connect();
 
   // MessagePipeReader implementation
-  void OnPipeClosed() override;
-  void OnPipeError(MojoResult error) override;
+  virtual void OnPipeClosed() override;
+  virtual void OnPipeError(MojoResult error) override;
 
  protected:
   ChannelMojo* owner_;
 
   DISALLOW_COPY_AND_ASSIGN(ControlReader);
 };
 
 // ControlReader for server-side ChannelMojo.
 class ServerControlReader : public ControlReader {
  public:
   ServerControlReader(mojo::ScopedMessagePipeHandle pipe, ChannelMojo* owner);
-  ~ServerControlReader() override;
+  virtual ~ServerControlReader();
 
   // ControlReader override
-  bool Connect() override;
+  virtual bool Connect() override;
 
   // MessagePipeReader implementation
-  void OnMessageReceived() override;
+  virtual void OnMessageReceived() override;
 
  private:
   MojoResult SendHelloRequest();
   MojoResult RespondHelloResponse();
 
   mojo::ScopedMessagePipeHandle message_pipe_;
 
   DISALLOW_COPY_AND_ASSIGN(ServerControlReader);
 };
 
 // ControlReader for client-side ChannelMojo.
 class ClientControlReader : public ControlReader {
  public:
   ClientControlReader(mojo::ScopedMessagePipeHandle pipe, ChannelMojo* owner);
 
   // MessagePipeReader implementation
-  void OnMessageReceived() override;
+  virtual void OnMessageReceived() override;
 
  private:
   MojoResult RespondHelloRequest(MojoHandle message_channel);
 
   DISALLOW_COPY_AND_ASSIGN(ClientControlReader);
 };
 
 }  // namespace internal
 }  // namespace IPC
 
 #endif  // IPC_MOJO_IPC_CHANNEL_MOJO_READERS_H_