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

content/browser/browser_plugin/browser_plugin_guest.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/browser_plugin/browser_plugin_guest.h"
 
 #include <algorithm>
 
 #include "base/message_loop/message_loop.h"
 #include "base/pickle.h"
@@ skipping 33 matching lines @@
 namespace content {
 
 class BrowserPluginGuest::EmbedderWebContentsObserver
     : public WebContentsObserver {
  public:
   explicit EmbedderWebContentsObserver(BrowserPluginGuest* guest)
       : WebContentsObserver(guest->embedder_web_contents()),
         browser_plugin_guest_(guest) {
   }
 
-  virtual ~EmbedderWebContentsObserver() {
-  }
+  ~EmbedderWebContentsObserver() override {}
 
   // WebContentsObserver implementation.
-  virtual void WasShown() override {
+  void WasShown() override {
     browser_plugin_guest_->EmbedderVisibilityChanged(true);
   }
 
-  virtual void WasHidden() override {
+  void WasHidden() override {
     browser_plugin_guest_->EmbedderVisibilityChanged(false);
   }
 
  private:
   BrowserPluginGuest* browser_plugin_guest_;
 
   DISALLOW_COPY_AND_ASSIGN(EmbedderWebContentsObserver);
 };
 
 BrowserPluginGuest::BrowserPluginGuest(bool has_render_view,
@@ skipping 748 matching lines @@
 void BrowserPluginGuest::OnImeCompositionRangeChanged(
       const gfx::Range& range,
       const std::vector<gfx::Rect>& character_bounds) {
   static_cast<RenderWidgetHostViewBase*>(
       web_contents()->GetRenderWidgetHostView())->ImeCompositionRangeChanged(
           range, character_bounds);
 }
 #endif
 
 }  // namespace content