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

ipc/ipc_channel_posix_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.
 
 // These tests are POSIX only.
 
 #include "ipc/ipc_channel_posix.h"
 
 #include <fcntl.h>
 #include <sys/socket.h>
@@ skipping 91 matching lines @@
 
 class IPCChannelPosixTest : public base::MultiProcessTest {
  public:
   static void SetUpSocket(IPC::ChannelHandle *handle,
                           IPC::Channel::Mode mode);
   static void SpinRunLoop(base::TimeDelta delay);
   static const std::string GetConnectionSocketName();
   static const std::string GetChannelDirName();
 
  protected:
-  virtual void SetUp();
-  virtual void TearDown();
+  void SetUp() override;
+  void TearDown() override;
 
  private:
   scoped_ptr<base::MessageLoopForIO> message_loop_;
 };
 
 const std::string IPCChannelPosixTest::GetChannelDirName() {
 #if defined(OS_ANDROID)
   base::FilePath tmp_dir;
   PathService::Get(base::DIR_CACHE, &tmp_dir);
   return tmp_dir.value();
@@ skipping 353 matching lines @@
   if (connected) {
     IPCChannelPosixTest::SpinRunLoop(TestTimeouts::action_max_timeout());
     EXPECT_EQ(IPCChannelPosixTestListener::CHANNEL_ERROR, listener.status());
   } else {
     EXPECT_EQ(IPCChannelPosixTestListener::DISCONNECTED, listener.status());
   }
   return 0;
 }
 
 }  // namespace