Standardize usage of virtual/override/final in gpu/

gpu/command_buffer/service/gles2_cmd_decoder.h

 // 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.
 
 // This file contains the GLES2Decoder class.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_H_
 #define GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_H_
 
 #include <vector>
@@ skipping 50 matching lines @@
   typedef base::Callback<bool(uint32 id)> WaitSyncPointCallback;
 
   // The default stencil mask, which has all bits set.  This really should be a
   // GLuint, but we can't #include gl_bindings.h in this file without causing
   // macro redefinitions.
   static const unsigned int kDefaultStencilMask;
 
   // Creates a decoder.
   static GLES2Decoder* Create(ContextGroup* group);
 
-  virtual ~GLES2Decoder();
+  ~GLES2Decoder() override;
 
   bool initialized() const {
     return initialized_;
   }
 
   void set_initialized() {
     initialized_ = true;
   }
 
   bool debug() const {
@@ skipping 170 matching lines @@
   bool debug_;
   bool log_commands_;
 
   DISALLOW_COPY_AND_ASSIGN(GLES2Decoder);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_H_