Revert 170483 - Remove PrefObserver usages, batch 12.

chrome/browser/ui/browser_command_controller.h

Index: chrome/browser/ui/browser_command_controller.h
===================================================================
--- chrome/browser/ui/browser_command_controller.h	(revision 170518)
+++ chrome/browser/ui/browser_command_controller.h	(working copy)
@@ -6,6 +6,7 @@
 #define CHROME_BROWSER_UI_BROWSER_COMMAND_CONTROLLER_H_
 
 #include "base/prefs/public/pref_change_registrar.h"
+#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/sessions/tab_restore_service_observer.h"
@@ -27,6 +28,7 @@
 
 class BrowserCommandController : public CommandUpdater::CommandUpdaterDelegate,
                                  public content::NotificationObserver,
+                                 public PrefObserver,
                                  public TabStripModelObserver,
                                  public TabRestoreServiceObserver,
                                  public ProfileSyncServiceObserver {
@@ -86,6 +88,10 @@
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
+  // Overridden from PrefObserver:
+  virtual void OnPreferenceChanged(PrefServiceBase* service,
+                                   const std::string& pref_name) OVERRIDE;
+
   // Overridden from TabStripModelObserver:
   virtual void TabInsertedAt(content::WebContents* contents,
                              int index,
@@ -133,10 +139,6 @@
   // Updates commands that affect the bookmark bar.
   void UpdateCommandsForBookmarkBar();
 
-  // Updates commands that affect file selection dialogs in aggregate,
-  // namely the save-page-as state and the open-file state.
-  void UpdateCommandsForFileSelectionDialogs();
-
   // Update commands whose state depends on the type of fullscreen mode the
   // window is in.
   void UpdateCommandsForFullscreenMode(FullScreenMode fullscreen_mode);