Standardize usage of virtual/override/final in content/browser/

content/browser/loader/async_resource_handler.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.
 
 #include "content/browser/loader/async_resource_handler.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/command_line.h"
@@ skipping 55 matching lines @@
 
 }  // namespace
 
 class DependentIOBuffer : public net::WrappedIOBuffer {
  public:
   DependentIOBuffer(ResourceBuffer* backing, char* memory)
       : net::WrappedIOBuffer(memory),
         backing_(backing) {
   }
  private:
-  virtual ~DependentIOBuffer() {}
+  ~DependentIOBuffer() override {}
   scoped_refptr<ResourceBuffer> backing_;
 };
 
 AsyncResourceHandler::AsyncResourceHandler(
     net::URLRequest* request,
     ResourceDispatcherHostImpl* rdh)
     : ResourceHandler(request),
       ResourceMessageDelegate(request),
       rdh_(rdh),
       pending_data_count_(0),
@@ skipping 314 matching lines @@
     request()->LogUnblocked();
     controller()->Resume();
   }
 }
 
 void AsyncResourceHandler::OnDefer() {
   request()->LogBlockedBy("AsyncResourceHandler");
 }
 
 }  // namespace content