Add OVERRIDE to chrome/browser/extensions/.

chrome/browser/extensions/sandboxed_extension_unpacker.h

Index: chrome/browser/extensions/sandboxed_extension_unpacker.h
diff --git a/chrome/browser/extensions/sandboxed_extension_unpacker.h b/chrome/browser/extensions/sandboxed_extension_unpacker.h
index 57b4a6f59864c2d694c245a9e392df4680a886c4..f99542ec7ce3ccaa2259ed2a8b1fd0473e6db179 100644
--- a/chrome/browser/extensions/sandboxed_extension_unpacker.h
+++ b/chrome/browser/extensions/sandboxed_extension_unpacker.h
@@ -194,8 +194,8 @@ class SandboxedExtensionUnpacker : public UtilityProcessHost::Client {
   void StartProcessOnIOThread(const FilePath& temp_crx_path);
 
   // UtilityProcessHost::Client
-  virtual bool OnMessageReceived(const IPC::Message& message);
-  virtual void OnProcessCrashed(int exit_code);
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
+  virtual void OnProcessCrashed(int exit_code) OVERRIDE;
 
   // IPC message handlers.
   void OnUnpackExtensionSucceeded(const base::DictionaryValue& manifest);