Standardize usage of virtual/override/final in gpu/

gpu/command_buffer/client/cmd_buffer_helper_test.cc

 // 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.
 
 // Tests for the Command Buffer Helper.
 
 #include <list>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 28 matching lines @@
 // Override CommandBufferService::Flush() to lock flushing and simulate
 // the buffer becoming full in asynchronous mode.
 class CommandBufferServiceLocked : public CommandBufferService {
  public:
   explicit CommandBufferServiceLocked(
       TransferBufferManagerInterface* transfer_buffer_manager)
       : CommandBufferService(transfer_buffer_manager),
         flush_locked_(false),
         last_flush_(-1),
         flush_count_(0) {}
-  virtual ~CommandBufferServiceLocked() {}
+  ~CommandBufferServiceLocked() override {}
 
-  virtual void Flush(int32 put_offset) override {
+  void Flush(int32 put_offset) override {
     flush_count_++;
     if (!flush_locked_) {
       last_flush_ = -1;
       CommandBufferService::Flush(put_offset);
     } else {
       last_flush_ = put_offset;
     }
   }
 
   void LockFlush() { flush_locked_ = true; }
 
   void UnlockFlush() { flush_locked_ = false; }
 
   int FlushCount() { return flush_count_; }
 
-  virtual void WaitForGetOffsetInRange(int32 start, int32 end) override {
+  void WaitForGetOffsetInRange(int32 start, int32 end) override {
     if (last_flush_ != -1) {
       CommandBufferService::Flush(last_flush_);
       last_flush_ = -1;
     }
     CommandBufferService::WaitForGetOffsetInRange(start, end);
   }
 
  private:
   bool flush_locked_;
   int last_flush_;
@@ skipping 625 matching lines @@
   helper_->Finish();
 
   // Check that the commands did happen.
   Mock::VerifyAndClearExpectations(api_mock_.get());
 
   // Check the error status.
   EXPECT_EQ(error::kNoError, GetError());
 }
 
 }  // namespace gpu