Standardize usage of virtual/override/final specifiers.

media/cast/test/utility/tap_proxy.cc

Index: media/cast/test/utility/tap_proxy.cc
diff --git a/media/cast/test/utility/tap_proxy.cc b/media/cast/test/utility/tap_proxy.cc
index 054687411174d737f13e986f42e8d1f9135ea0a2..eac758963ef8cef8a88670d0ad003b995faecd30 100644
--- a/media/cast/test/utility/tap_proxy.cc
+++ b/media/cast/test/utility/tap_proxy.cc
@@ -41,7 +41,7 @@ class SendToFDPipe : public PacketPipe {
  public:
   explicit SendToFDPipe(int fd) : fd_(fd) {
   }
-  virtual void Send(scoped_ptr<Packet> packet) override {
+  void Send(scoped_ptr<Packet> packet) override {
     while (1) {
       int written = write(
           fd_,
@@ -85,11 +85,10 @@ class QueueManager : public base::MessageLoopForIO::Watcher {
                                  &tick_clock_);
   }
 
-  virtual ~QueueManager() {
-  }
+  ~QueueManager() override {}
 
   // MessageLoopForIO::Watcher methods
-  virtual void OnFileCanReadWithoutBlocking(int fd) override {
+  void OnFileCanReadWithoutBlocking(int fd) override {
     scoped_ptr<Packet> packet(new Packet(kMaxPacketSize));
     int nread = read(input_fd_,
                      reinterpret_cast<char*>(&packet->front()),
@@ -103,9 +102,7 @@ class QueueManager : public base::MessageLoopForIO::Watcher {
     packet->resize(nread);
     packet_pipe_->Send(packet.Pass());
   }
-  virtual void OnFileCanWriteWithoutBlocking(int fd) override {
-    NOTREACHED();
-  }
+  void OnFileCanWriteWithoutBlocking(int fd) override { NOTREACHED(); }
 
  private:
   int input_fd_;
@@ -172,8 +169,7 @@ ByteCounter out_pipe_output_counter;
 class ByteCounterPipe : public media::cast::test::PacketPipe {
  public:
   ByteCounterPipe(ByteCounter* counter) : counter_(counter) {}
-  virtual void Send(scoped_ptr<media::cast::Packet> packet)
-      override {
+  void Send(scoped_ptr<media::cast::Packet> packet) override {
     counter_->Increment(packet->size());
     pipe_->Send(packet.Pass());
   }