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

ipc/sync_socket_unittest.cc

 // 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.
 
 #include "base/sync_socket.h"
 
 #include <stdio.h>
 #include <string>
 #include <sstream>
 
@@ skipping 40 matching lines @@
 // messages from the client.
 class SyncSocketServerListener : public IPC::Listener {
  public:
   SyncSocketServerListener() : chan_(NULL) {
   }
 
   void Init(IPC::Channel* chan) {
     chan_ = chan;
   }
 
-  bool OnMessageReceived(const IPC::Message& msg) override {
+  virtual bool OnMessageReceived(const IPC::Message& msg) override {
     if (msg.routing_id() == MSG_ROUTING_CONTROL) {
       IPC_BEGIN_MESSAGE_MAP(SyncSocketServerListener, msg)
         IPC_MESSAGE_HANDLER(MsgClassSetHandle, OnMsgClassSetHandle)
         IPC_MESSAGE_HANDLER(MsgClassShutdown, OnMsgClassShutdown)
       IPC_END_MESSAGE_MAP()
     }
     return true;
   }
 
  private:
@@ skipping 50 matching lines @@
 class SyncSocketClientListener : public IPC::Listener {
  public:
   SyncSocketClientListener() {
   }
 
   void Init(base::SyncSocket* socket, IPC::Channel* chan) {
     socket_ = socket;
     chan_ = chan;
   }
 
-  bool OnMessageReceived(const IPC::Message& msg) override {
+  virtual bool OnMessageReceived(const IPC::Message& msg) override {
     if (msg.routing_id() == MSG_ROUTING_CONTROL) {
       IPC_BEGIN_MESSAGE_MAP(SyncSocketClientListener, msg)
         IPC_MESSAGE_HANDLER(MsgClassResponse, OnMsgClassResponse)
       IPC_END_MESSAGE_MAP()
     }
     return true;
   }
 
  private:
   // When a response is received from the server, it sends the same
@@ skipping 156 matching lines @@
 
   // Read from another socket to free some space for a new write.
   char hello[kHelloStringLength] = {0};
   pair[1].Receive(&hello[0], sizeof(hello));
 
   // Should be able to write more data to the buffer now.
   EXPECT_EQ(kHelloStringLength, pair[0].Send(kHelloString, kHelloStringLength));
 }
 
 }  // namespace