Remove content::NotificationObserver dependency from most Prefs code.

chrome/browser/ui/gtk/browser_window_gtk.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_GTK_BROWSER_WINDOW_GTK_H_
 #define CHROME_BROWSER_UI_GTK_BROWSER_WINDOW_GTK_H_
 
 #include <gtk/gtk.h>
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/prefs/public/pref_observer.h"
 #include "base/timer.h"
 #include "build/build_config.h"
 #include "chrome/browser/api/prefs/pref_member.h"
 #include "chrome/browser/debugger/devtools_window.h"
 #include "chrome/browser/extensions/extension_keybinding_registry.h"
 #include "chrome/browser/infobars/infobar_container.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/tabs/tab_strip_model_observer.h"
 #include "ui/base/gtk/gtk_signal.h"
 #include "ui/base/ui_base_types.h"
@@ skipping 28 matching lines @@
 class Extension;
 }
 
 // An implementation of BrowserWindow for GTK.
 // Cross-platform code will interact with this object when
 // it needs to manipulate the window.
 
 class BrowserWindowGtk
     : public BrowserWindow,
       public content::NotificationObserver,
+      public PrefObserver,
       public TabStripModelObserver,
       public ui::ActiveWindowWatcherXObserver,
       public InfoBarContainer::Delegate,
       public extensions::ExtensionKeybindingRegistry::Delegate {
  public:
   explicit BrowserWindowGtk(Browser* browser);
   virtual ~BrowserWindowGtk();
 
   // Separating initialization from constructor.
   void Init();
@@ skipping 101 matching lines @@
   virtual void ShowPasswordGenerationBubble(
       const gfx::Rect& rect,
       const content::PasswordForm& form,
       autofill::PasswordGenerator* password_generator) OVERRIDE;
 
   // Overridden from 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;
+
   // Overridden from TabStripModelObserver:
   virtual void TabDetachedAt(TabContents* contents, int index) OVERRIDE;
   virtual void ActiveTabChanged(TabContents* old_contents,
                                 TabContents* new_contents,
                                 int index,
                                 bool user_gesture) OVERRIDE;
 
   // Overridden from ActiveWindowWatcherXObserver.
   virtual void ActiveWindowChanged(GdkWindow* active_window) OVERRIDE;
 
@@ skipping 374 matching lines @@
   scoped_ptr<FullscreenExitBubbleGtk> fullscreen_exit_bubble_;
 
   FullscreenExitBubbleType fullscreen_exit_bubble_type_;
 
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserWindowGtk);
 };
 
 #endif  // CHROME_BROWSER_UI_GTK_BROWSER_WINDOW_GTK_H_