Remove PrefObserver usages, batch 13.

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

Index: chrome/browser/ui/webui/options/content_settings_handler.h
diff --git a/chrome/browser/ui/webui/options/content_settings_handler.h b/chrome/browser/ui/webui/options/content_settings_handler.h
index 5aa54be5c6d6a08171a52f04f03c88a30182dbab..c39336d80cc50de43c743f18a5cf1e856743effc 100644
--- a/chrome/browser/ui/webui/options/content_settings_handler.h
+++ b/chrome/browser/ui/webui/options/content_settings_handler.h
@@ -10,7 +10,6 @@
 
 #include "base/memory/scoped_ptr.h"
 #include "base/prefs/public/pref_change_registrar.h"
-#include "base/prefs/public/pref_observer.h"
 #include "chrome/browser/pepper_flash_settings_manager.h"
 #include "chrome/browser/ui/webui/options/options_ui.h"
 #include "chrome/common/content_settings.h"
@@ -24,8 +23,7 @@ class ProtocolHandlerRegistry;
 namespace options {
 
 class ContentSettingsHandler : public OptionsPageUIHandler,
-                               public PepperFlashSettingsManager::Client,
-                               public PrefObserver {
+                               public PepperFlashSettingsManager::Client {
  public:
   ContentSettingsHandler();
   virtual ~ContentSettingsHandler();
@@ -42,10 +40,6 @@ class ContentSettingsHandler : public OptionsPageUIHandler,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
-  // PrefObserver implementation.
-  virtual void OnPreferenceChanged(PrefServiceBase* service,
-                                   const std::string& pref_name) OVERRIDE;
-
   // PepperFlashSettingsManager::Client implementation.
   virtual void OnGetPermissionSettingsCompleted(
       uint32 request_id,
@@ -85,8 +79,7 @@ class ContentSettingsHandler : public OptionsPageUIHandler,
   void UpdateExceptionsViewFromModel(const ExContentSettingsType& type);
   // Clobbers and rebuilds the specific content setting type exceptions
   // OTR table.
-  void UpdateOTRExceptionsViewFromModel(
-      const ExContentSettingsType& type);
+  void UpdateOTRExceptionsViewFromModel(const ExContentSettingsType& type);
   // Clobbers and rebuilds all the exceptions tables in the page (both normal
   // and OTR tables).
   void UpdateAllExceptionsViewsFromModel();