Remove content::NotificationObserver dependency from most Prefs code.

chrome/browser/ui/views/location_bar/location_bar_view.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_LOCATION_BAR_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_LOCATION_BAR_VIEW_H_
 
 #include <string>
 #include <vector>
 
 #include "base/compiler_specific.h"
+#include "base/prefs/public/pref_observer.h"
 #include "chrome/browser/api/prefs/pref_member.h"
 #include "chrome/browser/extensions/extension_context_menu_model.h"
 #include "chrome/browser/search_engines/template_url_service_observer.h"
 #include "chrome/browser/ui/omnibox/location_bar.h"
 #include "chrome/browser/ui/omnibox/omnibox_edit_controller.h"
 #include "chrome/browser/ui/search/search_model_observer.h"
 #include "chrome/browser/ui/toolbar/toolbar_model.h"
 #include "chrome/browser/ui/views/dropdown_bar_host.h"
 #include "chrome/browser/ui/views/dropdown_bar_host_delegate.h"
 #include "chrome/browser/ui/views/extensions/extension_popup.h"
@@ skipping 50 matching lines @@
 //
 /////////////////////////////////////////////////////////////////////////////
 class LocationBarView : public LocationBar,
                         public LocationBarTesting,
                         public views::View,
                         public views::DragController,
                         public OmniboxEditController,
                         public DropdownBarHostDelegate,
                         public chrome::search::SearchModelObserver,
                         public TemplateURLServiceObserver,
-                        public content::NotificationObserver {
+                        public content::NotificationObserver,
+                        public PrefObserver {
  public:
   // The location bar view's class name.
   static const char kViewClassName[];
 
   // DropdownBarHostDelegate
   virtual void SetFocusAndSelection(bool select_all) OVERRIDE;
   virtual void SetAnimationOffset(int offset) OVERRIDE;
 
   // chrome::search::SearchModelObserver:
   virtual void ModeChanged(const chrome::search::Mode& old_mode,
@@ skipping 239 matching lines @@
   virtual bool GetBookmarkStarVisibility() OVERRIDE;
 
   // Overridden from TemplateURLServiceObserver
   virtual void OnTemplateURLServiceChanged() OVERRIDE;
 
   // Overridden from content::NotificationObserver
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
+  // Overridden from PrefObserver
+  virtual void OnPreferenceChanged(PrefServiceBase* service,
+                                   const std::string& pref_name) OVERRIDE;
+
   // Returns the height of the control without the top and bottom
   // edges(i.e.  the height of the edit control inside).  If
   // |use_preferred_size| is true this will be the preferred height,
   // otherwise it will be the current height.
   int GetInternalHeight(bool use_preferred_size);
 
   // Space between items in the location bar.
   static int GetItemPadding();
 
   // Space between the edges and the items next to them.
@@ skipping 222 matching lines @@
 
 #if defined(USE_AURA)
   // Observer for a fade-in animation.
   scoped_ptr<FadeAnimationObserver> fade_animation_observer_;
 #endif
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(LocationBarView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_LOCATION_BAR_VIEW_H_