Add OVERRIDE annotation where appropriate in devtools_agent.h

content/renderer/devtools/devtools_agent.h

Index: content/renderer/devtools/devtools_agent.h
diff --git a/content/renderer/devtools/devtools_agent.h b/content/renderer/devtools/devtools_agent.h
index 9d58d97a06b66339545e96821fd2f8fc1725b331..17889fdf9537691d5e2f84339c50c9cc6e92c21b 100644
--- a/content/renderer/devtools/devtools_agent.h
+++ b/content/renderer/devtools/devtools_agent.h
@@ -50,13 +50,13 @@ class DevToolsAgent : public RenderViewObserver,
   // WebDevToolsAgentClient implementation
   virtual void sendMessageToInspectorFrontend(const blink::WebString& data);
 
-  virtual int hostIdentifier();
-  virtual void saveAgentRuntimeState(const blink::WebString& state);
+  virtual int hostIdentifier() OVERRIDE;
+  virtual void saveAgentRuntimeState(const blink::WebString& state) OVERRIDE;
   virtual blink::WebDevToolsAgentClient::WebKitClientMessageLoop*
-      createClientMessageLoop();
-  virtual void clearBrowserCache();
-  virtual void clearBrowserCookies();
-  virtual void visitAllocatedObjects(AllocatedObjectVisitor* visitor);
+      createClientMessageLoop() OVERRIDE;
+  virtual void clearBrowserCache() OVERRIDE;
+  virtual void clearBrowserCookies() OVERRIDE;
+  virtual void visitAllocatedObjects(AllocatedObjectVisitor* visitor) OVERRIDE;
 
   typedef void (*TraceEventCallback)(
       char phase, const unsigned char*, const char* name, unsigned long long id,
@@ -74,9 +74,10 @@ class DevToolsAgent : public RenderViewObserver,
       const blink::WebRect& view_rect, float device_scale_factor,
       bool fit_to_view);
   virtual void enableDeviceEmulation(
-      const blink::WebDeviceEmulationParams& params);
-  virtual void disableDeviceEmulation();
-  virtual void setTouchEventEmulationEnabled(bool enabled, bool allow_pinch);
+      const blink::WebDeviceEmulationParams& params) OVERRIDE;
+  virtual void disableDeviceEmulation() OVERRIDE;
+  virtual void setTouchEventEmulationEnabled(bool enabled,
+                                             bool allow_pinch) OVERRIDE;
 
   void OnAttach();
   void OnReattach(const std::string& agent_state);