Standardize usage of virtual/override/final specifiers.

The Google C++ style guide states:

  Explicitly annotate overrides of virtual functions or virtual
  destructors with an override or (less frequently) final specifier.
  Older (pre-C++11) code will use the virtual keyword as an inferior
  alternative annotation. For clarity, use exactly one of override,
  final, or virtual when declaring an override.

To better conform to these guidelines, the following constructs have
been rewritten:

- if a base class has a virtual destructor, then:
    virtual ~Foo();                   ->  ~Foo() override;
- virtual void Foo() override;        ->  void Foo() override;
- virtual void Foo() override final;  ->  void Foo() final;

This patch was automatically generated. The clang plugin can generate
fixit hints, which are suggested edits when it is 100% sure it knows how
to fix a problem. The hints from the clang plugin were applied to the
source tree using the tool in https://codereview.chromium.org/598073004.

BUG=417463
R=wolenetz@chromium.org

Review URL: https://codereview.chromium.org/661163004

Cr-Commit-Position: refs/heads/master@{#301462}

3 files changed, 4 insertions, 4 deletions

diff --git a/media/cast/receiver/audio_decoder_unittest.cc b/media/cast/receiver/audio_decoder_unittest.cc
index 7f46715..ac13af1 100644
--- a/media/cast/receiver/audio_decoder_unittest.cc
+++ b/media/cast/receiver/audio_decoder_unittest.cc
@@ -41,7 +41,7 @@ class AudioDecoderTest : public ::testing::TestWithParam<TestScenario> {
   }
 
  protected:
-  virtual void SetUp() override {
+  void SetUp() override {
     audio_decoder_.reset(new AudioDecoder(cast_environment_,
                                           GetParam().num_channels,
                                           GetParam().sampling_rate,
diff --git a/media/cast/receiver/frame_receiver_unittest.cc b/media/cast/receiver/frame_receiver_unittest.cc
index abdfb9d..24e1a0b 100644
--- a/media/cast/receiver/frame_receiver_unittest.cc
+++ b/media/cast/receiver/frame_receiver_unittest.cc
@@ -77,9 +77,9 @@ class FrameReceiverTest : public ::testing::Test {
                             task_runner_);
   }
 
-  virtual ~FrameReceiverTest() {}
+  ~FrameReceiverTest() override {}
 
-  virtual void SetUp() {
+  void SetUp() override {
     payload_.assign(kPacketSize, 0);
 
     // Always start with a key frame.
diff --git a/media/cast/receiver/video_decoder_unittest.cc b/media/cast/receiver/video_decoder_unittest.cc
index 2184707..f777cb3 100644
--- a/media/cast/receiver/video_decoder_unittest.cc
+++ b/media/cast/receiver/video_decoder_unittest.cc
@@ -51,7 +51,7 @@ class VideoDecoderTest : public ::testing::TestWithParam<Codec> {
   }
 
  protected:
-  virtual void SetUp() override {
+  void SetUp() override {
     video_decoder_.reset(new VideoDecoder(cast_environment_, GetParam()));
     CHECK_EQ(STATUS_VIDEO_INITIALIZED, video_decoder_->InitializationResult());