Standardize usage of virtual/override/final in net/

net/spdy/spdy_buffer.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 "net/spdy/spdy_buffer.h"
 
 #include <cstring>
 
 #include "base/callback.h"
 #include "base/logging.h"
@@ skipping 27 matching lines @@
 // SpdyBuffer::GetIOBufferForRemainingData().
 class SpdyBuffer::SharedFrameIOBuffer : public IOBuffer {
  public:
   SharedFrameIOBuffer(const scoped_refptr<SharedFrame>& shared_frame,
                       size_t offset)
       : IOBuffer(shared_frame->data->data() + offset),
         shared_frame_(shared_frame),
         offset_(offset) {}
 
  private:
-  virtual ~SharedFrameIOBuffer() {
+  ~SharedFrameIOBuffer() override {
     // Prevent ~IOBuffer() from trying to delete |data_|.
     data_ = NULL;
   }
 
   const scoped_refptr<SharedFrame> shared_frame_;
   const size_t offset_;
 
   DISALLOW_COPY_AND_ASSIGN(SharedFrameIOBuffer);
 };
 
@@ skipping 43 matching lines @@
   DCHECK_GE(consume_size, 1u);
   DCHECK_LE(consume_size, GetRemainingSize());
   offset_ += consume_size;
   for (std::vector<ConsumeCallback>::const_iterator it =
            consume_callbacks_.begin(); it != consume_callbacks_.end(); ++it) {
     it->Run(consume_size, consume_source);
   }
 };
 
 }  // namespace net