Standardize usage of virtual/override/final specifiers in content/.

content/renderer/media/webrtc/video_destination_handler.cc

 // Copyright (c) 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 "content/renderer/media/webrtc/video_destination_handler.h"
 
 #include <string>
 
 #include "base/base64.h"
 #include "base/debug/trace_event.h"
@@ skipping 171 matching lines @@
 // PpFrameWriterProxy is a helper class to make sure the user won't use
 // PpFrameWriter after it is released (IOW its owner - WebMediaStreamSource -
 // is released).
 class PpFrameWriterProxy : public FrameWriterInterface {
  public:
   explicit PpFrameWriterProxy(const base::WeakPtr<PpFrameWriter>& writer)
       : writer_(writer) {
     DCHECK(writer_ != NULL);
   }
 
-  virtual ~PpFrameWriterProxy() {}
+  ~PpFrameWriterProxy() override {}
 
-  virtual void PutFrame(PPB_ImageData_Impl* image_data,
-                        int64 time_stamp_ns) override {
+  void PutFrame(PPB_ImageData_Impl* image_data, int64 time_stamp_ns) override {
     writer_->PutFrame(image_data, time_stamp_ns);
   }
 
  private:
   base::WeakPtr<PpFrameWriter> writer_;
 
   DISALLOW_COPY_AND_ASSIGN(PpFrameWriterProxy);
 };
 
 bool VideoDestinationHandler::Open(
@@ skipping 39 matching lines @@
 
   stream.addTrack(MediaStreamVideoTrack::CreateVideoTrack(
       writer, constraints, MediaStreamVideoSource::ConstraintsCallback(),
       track_enabled));
 
   *frame_writer = new PpFrameWriterProxy(writer->AsWeakPtr());
   return true;
 }
 
 }  // namespace content