Move WebUIMessageHandler to its own file in the public directory and put it in the content namesp...

chrome/browser/ui/webui/options2/options_ui2.h

Index: chrome/browser/ui/webui/options2/options_ui2.h
===================================================================
--- chrome/browser/ui/webui/options2/options_ui2.h	(revision 116051)
+++ chrome/browser/ui/webui/options2/options_ui2.h	(working copy)
@@ -15,12 +15,13 @@
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/notification_types.h"
+#include "content/public/browser/web_ui_message_handler.h"
 
 namespace options2 {
 
 // The base class handler of Javascript messages of options pages.
-class OptionsPageUIHandler : public WebUIMessageHandler,
-                              public content::NotificationObserver {
+class OptionsPageUIHandler : public content::WebUIMessageHandler,
+                             public content::NotificationObserver {
  public:
   OptionsPageUIHandler();
   virtual ~OptionsPageUIHandler();