Standardize usage of virtual/override/final in media/

media/audio/audio_input_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/basictypes.h"
 #include "base/environment.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/platform_thread.h"
 #include "media/audio/audio_io.h"
 #include "media/audio/audio_manager_base.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace media {
 
 // This class allows to find out if the callbacks are occurring as
 // expected and if any error has been reported.
 class TestInputCallback : public AudioInputStream::AudioInputCallback {
  public:
   explicit TestInputCallback()
       : callback_count_(0),
         had_error_(0) {
   }
-  virtual void OnData(AudioInputStream* stream,
-                      const AudioBus* source,
-                      uint32 hardware_delay_bytes,
-                      double volume) override {
+  void OnData(AudioInputStream* stream,
+              const AudioBus* source,
+              uint32 hardware_delay_bytes,
+              double volume) override {
     ++callback_count_;
   }
-  virtual void OnError(AudioInputStream* stream) override {
-    ++had_error_;
-  }
+  void OnError(AudioInputStream* stream) override { ++had_error_; }
   // Returns how many times OnData() has been called.
   int callback_count() const {
     return callback_count_;
   }
   // Returns how many times the OnError callback was called.
   int had_error() const {
     return had_error_;
   }
 
  private:
@@ skipping 189 matching lines @@
       base::MessageLoop::QuitClosure(),
       base::TimeDelta::FromMilliseconds(500));
   message_loop_.Run();
   EXPECT_GE(test_callback.callback_count(), 2);
   EXPECT_FALSE(test_callback.had_error());
 
   StopAndCloseAudioInputStreamOnAudioThread();
 }
 
 }  // namespace media