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

content/browser/renderer_host/render_widget_host_impl.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/renderer_host/render_widget_host_impl.h"
 
 #include <math.h>
 #include <set>
 #include <utility>
 
@@ skipping 106 matching lines @@
 
 // Implements the RenderWidgetHostIterator interface. It keeps a list of
 // RenderWidgetHosts, and makes sure it returns a live RenderWidgetHost at each
 // iteration (or NULL if there isn't any left).
 class RenderWidgetHostIteratorImpl : public RenderWidgetHostIterator {
  public:
   RenderWidgetHostIteratorImpl()
       : current_index_(0) {
   }
 
-  virtual ~RenderWidgetHostIteratorImpl() {
-  }
+  ~RenderWidgetHostIteratorImpl() override {}
 
   void Add(RenderWidgetHost* host) {
     hosts_.push_back(RenderWidgetHostID(host->GetProcess()->GetID(),
                                         host->GetRoutingID()));
   }
 
   // RenderWidgetHostIterator:
-  virtual RenderWidgetHost* GetNextHost() override {
+  RenderWidgetHost* GetNextHost() override {
     RenderWidgetHost* host = NULL;
     while (current_index_ < hosts_.size() && !host) {
       RenderWidgetHostID id = hosts_[current_index_];
       host = RenderWidgetHost::FromID(id.first, id.second);
       ++current_index_;
     }
     return host;
   }
 
  private:
@@ skipping 2250 matching lines @@
 }
 #endif
 
 SkColorType RenderWidgetHostImpl::PreferredReadbackFormat() {
   if (view_)
     return view_->PreferredReadbackFormat();
   return kN32_SkColorType;
 }
 
 }  // namespace content