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

content/renderer/web_ui_mojo.h

Index: content/renderer/web_ui_mojo.h
diff --git a/content/renderer/web_ui_mojo.h b/content/renderer/web_ui_mojo.h
index b3d67f6e8e78091662becaaad45809aae55e12e0..dd9e752b238670ae4853a58c77f160fff0ec5083 100644
--- a/content/renderer/web_ui_mojo.h
+++ b/content/renderer/web_ui_mojo.h
@@ -34,12 +34,12 @@ class WebUIMojo
   class MainFrameObserver : public RenderFrameObserver {
    public:
     explicit MainFrameObserver(WebUIMojo* web_ui_mojo);
-    virtual ~MainFrameObserver();
+    ~MainFrameObserver() override;
 
     // RenderFrameObserver overrides:
-    virtual void WillReleaseScriptContext(v8::Handle<v8::Context> context,
-                                          int world_id) override;
-    virtual void DidFinishDocumentLoad() override;
+    void WillReleaseScriptContext(v8::Handle<v8::Context> context,
+                                  int world_id) override;
+    void DidFinishDocumentLoad() override;
 
    private:
     WebUIMojo* web_ui_mojo_;
@@ -47,7 +47,7 @@ class WebUIMojo
     DISALLOW_COPY_AND_ASSIGN(MainFrameObserver);
   };
 
-  virtual ~WebUIMojo();
+  ~WebUIMojo() override;
 
   void CreateContextState();
   void DestroyContextState(v8::Handle<v8::Context> context);
@@ -59,8 +59,8 @@ class WebUIMojo
   WebUIMojoContextState* GetContextState();
 
   // RenderViewObserver overrides:
-  virtual void DidCreateDocumentElement(blink::WebLocalFrame* frame) override;
-  virtual void DidClearWindowObject(blink::WebLocalFrame* frame) override;
+  void DidCreateDocumentElement(blink::WebLocalFrame* frame) override;
+  void DidClearWindowObject(blink::WebLocalFrame* frame) override;
 
   MainFrameObserver main_frame_observer_;