Remove PrefObserver usages, batch 13.

chrome/browser/ui/webui/options/startup_pages_handler.h

Index: chrome/browser/ui/webui/options/startup_pages_handler.h
diff --git a/chrome/browser/ui/webui/options/startup_pages_handler.h b/chrome/browser/ui/webui/options/startup_pages_handler.h
index 4e9e6391f7447983440a1e708c9459ef1f79d9d3..557417ddbd5e3fe9dc6d7ba7cc24c15a19073145 100644
--- a/chrome/browser/ui/webui/options/startup_pages_handler.h
+++ b/chrome/browser/ui/webui/options/startup_pages_handler.h
@@ -9,7 +9,6 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/prefs/public/pref_change_registrar.h"
-#include "base/prefs/public/pref_observer.h"
 #include "chrome/browser/api/prefs/pref_member.h"
 #include "chrome/browser/autocomplete/autocomplete_controller_delegate.h"
 #include "chrome/browser/ui/webui/options/options_ui.h"
@@ -24,7 +23,6 @@ namespace options {
 // Chrome browser options page UI handler.
 class StartupPagesHandler : public OptionsPageUIHandler,
                             public AutocompleteControllerDelegate,
-                            public PrefObserver,
                             public ui::TableModelObserver {
  public:
   StartupPagesHandler();
@@ -46,10 +44,6 @@ class StartupPagesHandler : public OptionsPageUIHandler,
   virtual void OnItemsRemoved(int start, int length) OVERRIDE;
 
  private:
-  // PrefObserver implementation.
-  virtual void OnPreferenceChanged(PrefServiceBase* service,
-                                   const std::string& pref_name) OVERRIDE;
-
   // Saves the changes that have been made. Called from WebUI.
   void CommitChanges(const ListValue* args);