chrome: Extract CommandUpdaterDelegate into its own header file.

chrome/browser/ui/browser_command_controller.h

Index: chrome/browser/ui/browser_command_controller.h
diff --git a/chrome/browser/ui/browser_command_controller.h b/chrome/browser/ui/browser_command_controller.h
index 1d8e96c4f4605baa3f69032ba506411ef9524b2d..11df3dd63f007114efa101f26a123f3cfe5eb056 100644
--- a/chrome/browser/ui/browser_command_controller.h
+++ b/chrome/browser/ui/browser_command_controller.h
@@ -9,6 +9,7 @@
 #include "base/prefs/public/pref_observer.h"
 #include "chrome/browser/api/sync/profile_sync_service_observer.h"
 #include "chrome/browser/command_updater.h"
+#include "chrome/browser/command_updater_delegate.h"
 #include "chrome/browser/sessions/tab_restore_service_observer.h"
 #include "chrome/browser/ui/tabs/tab_strip_model_observer.h"
 #include "content/public/browser/notification_observer.h"
@@ -26,7 +27,7 @@ struct NativeWebKeyboardEvent;
 
 namespace chrome {
 
-class BrowserCommandController : public CommandUpdater::CommandUpdaterDelegate,
+class BrowserCommandController : public CommandUpdaterDelegate,
                                  public content::NotificationObserver,
                                  public PrefObserver,
                                  public TabStripModelObserver,
@@ -78,7 +79,7 @@ class BrowserCommandController : public CommandUpdater::CommandUpdaterDelegate,
     FULLSCREEN_METRO_SNAP,
   };
 
-  // Overridden from CommandUpdater::CommandUpdaterDelegate:
+  // Overridden from CommandUpdaterDelegate:
   virtual void ExecuteCommandWithDisposition(
       int id,
       WindowOpenDisposition disposition) OVERRIDE;