Add OVERRIDE to content/.

content/renderer/devtools_agent_filter.h

Index: content/renderer/devtools_agent_filter.h
diff --git a/content/renderer/devtools_agent_filter.h b/content/renderer/devtools_agent_filter.h
index 05838859de469c4f476ede1c429b40d0943ae272..6284b6a8ff62b9cd61a5ad64ce8fc0f39d09aafa 100644
--- a/content/renderer/devtools_agent_filter.h
+++ b/content/renderer/devtools_agent_filter.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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.
 
@@ -29,9 +29,9 @@ class DevToolsAgentFilter : public IPC::ChannelProxy::MessageFilter {
 
  private:
   // IPC::ChannelProxy::MessageFilter override. Called on IO thread.
-  virtual bool OnMessageReceived(const IPC::Message& message);
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
-  virtual void OnFilterAdded(IPC::Channel* channel);
+  virtual void OnFilterAdded(IPC::Channel* channel) OVERRIDE;
 
   static void DispatchMessageLoop();