Standardize usage of virtual/override/final specifiers in ipc/.

ipc/ipc_channel_proxy_unittest.cc

 // 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.
 
 #include "build/build_config.h"
 
 #include "base/message_loop/message_loop.h"
 #include "base/pickle.h"
 #include "base/threading/thread.h"
 #include "ipc/ipc_message.h"
@@ skipping 214 matching lines @@
   uint32 supported_message_class_;
   bool is_global_filter_;
 
   FilterEvent last_filter_event_;
   bool message_filtering_enabled_;
 };
 
 class IPCChannelProxyTest : public IPCTestBase {
  public:
   IPCChannelProxyTest() {}
-  virtual ~IPCChannelProxyTest() {}
+  ~IPCChannelProxyTest() override {}
 
-  virtual void SetUp() override {
+  void SetUp() override {
     IPCTestBase::SetUp();
 
     Init("ChannelProxyClient");
 
     thread_.reset(new base::Thread("ChannelProxyTestServerThread"));
     base::Thread::Options options;
     options.message_loop_type = base::MessageLoop::TYPE_IO;
     thread_->StartWithOptions(options);
 
     listener_.reset(new QuitListener());
     CreateChannelProxy(listener_.get(), thread_->message_loop_proxy().get());
 
     ASSERT_TRUE(StartClient());
   }
 
-  virtual void TearDown() {
+  void TearDown() override {
     DestroyChannelProxy();
     thread_.reset();
     listener_.reset();
     IPCTestBase::TearDown();
   }
 
   void SendQuitMessageAndWaitForIdle() {
     sender()->Send(new WorkerMsg_Quit);
     base::MessageLoop::current()->Run();
     EXPECT_TRUE(WaitForClientShutdown());
@@ skipping 168 matching lines @@
       IPCTestBase::GetChannelName("ChannelProxyClient"),
       &listener));
   CHECK(channel->Connect());
   listener.Init(channel.get());
 
   base::MessageLoop::current()->Run();
   return 0;
 }
 
 }  // namespace