Standardize usage of virtual/override/final in content/renderer/

content/renderer/media/rtc_video_decoder_unittest.cc

 // Copyright 2013 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/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/thread.h"
 #include "content/renderer/media/rtc_video_decoder.h"
 #include "media/base/gmock_callback_support.h"
@@ skipping 39 matching lines @@
   virtual void TearDown() override {
     VLOG(2) << "TearDown";
     EXPECT_TRUE(vda_thread_.IsRunning());
     RunUntilIdle();  // Wait until all callbascks complete.
     vda_task_runner_->DeleteSoon(FROM_HERE, rtc_decoder_.release());
     // Make sure the decoder is released before stopping the thread.
     RunUntilIdle();
     vda_thread_.Stop();
   }
 
-  virtual int32_t Decoded(webrtc::I420VideoFrame& decoded_image) override {
+  int32_t Decoded(webrtc::I420VideoFrame& decoded_image) override {
     VLOG(2) << "Decoded";
     EXPECT_EQ(vda_task_runner_, base::MessageLoopProxy::current());
     return WEBRTC_VIDEO_CODEC_OK;
   }
 
   void CreateDecoder(webrtc::VideoCodecType codec_type) {
     VLOG(2) << "CreateDecoder";
     codec_.codecType = codec_type;
     rtc_decoder_ =
         RTCVideoDecoder::Create(codec_type, mock_gpu_factories_);
@@ skipping 151 matching lines @@
 
   EXPECT_FALSE(rtc_decoder_->IsFirstBufferAfterReset(RTCVideoDecoder::ID_LAST,
                                                      RTCVideoDecoder::ID_LAST));
   EXPECT_TRUE(
       rtc_decoder_->IsFirstBufferAfterReset(0, RTCVideoDecoder::ID_LAST));
   EXPECT_FALSE(
       rtc_decoder_->IsFirstBufferAfterReset(1, RTCVideoDecoder::ID_LAST));
 }
 
 }  // content