Standardize usage of virtual/override/final specifiers.

media/filters/ffmpeg_glue_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/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "media/base/mock_filters.h"
 #include "media/base/test_data_util.h"
 #include "media/ffmpeg/ffmpeg_common.h"
 #include "media/filters/ffmpeg_glue.h"
@@ skipping 27 matching lines @@
  public:
   FFmpegGlueTest()
       : protocol_(new StrictMock<MockProtocol>()) {
     // IsStreaming() is called when opening.
     EXPECT_CALL(*protocol_.get(), IsStreaming()).WillOnce(Return(true));
     glue_.reset(new FFmpegGlue(protocol_.get()));
     CHECK(glue_->format_context());
     CHECK(glue_->format_context()->pb);
   }
 
-  virtual ~FFmpegGlueTest() {
+  ~FFmpegGlueTest() override {
     // Ensure |glue_| and |protocol_| are still alive.
     CHECK(glue_.get());
     CHECK(protocol_.get());
 
     // |protocol_| should outlive |glue_|, so ensure it's destructed first.
     glue_.reset();
   }
 
   int ReadPacket(int size, uint8* data) {
     return glue_->format_context()->pb->read_packet(
@@ skipping 18 matching lines @@
 
   void Initialize(const char* filename) {
     data_ = ReadTestDataFile(filename);
     protocol_.reset(new InMemoryUrlProtocol(
         data_->data(), data_->data_size(), false));
     glue_.reset(new FFmpegGlue(protocol_.get()));
     CHECK(glue_->format_context());
     CHECK(glue_->format_context()->pb);
   }
 
-  virtual ~FFmpegGlueDestructionTest() {
+  ~FFmpegGlueDestructionTest() override {
     // Ensure Initialize() was called.
     CHECK(glue_.get());
     CHECK(protocol_.get());
 
     // |glue_| should be destroyed before |protocol_|.
     glue_.reset();
 
     // |protocol_| should be destroyed before |data_|.
     protocol_.reset();
     data_ = NULL;
@@ skipping 136 matching lines @@
   Initialize("bear-320x240.webm");
   ASSERT_TRUE(glue_->OpenContext());
   ASSERT_GT(glue_->format_context()->nb_streams, 0u);
 
   AVCodecContext* context = glue_->format_context()->streams[0]->codec;
   ASSERT_EQ(avcodec_open2(
       context, avcodec_find_decoder(context->codec_id), NULL), 0);
 }
 
 }  // namespace media