Move signin status and current user information into AppListModel.

ui/app_list/views/app_list_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 UI_APP_LIST_VIEWS_APP_LIST_VIEW_H_
 #define UI_APP_LIST_VIEWS_APP_LIST_VIEW_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "ui/app_list/app_list_export.h"
-#include "ui/app_list/signin_delegate_observer.h"
+#include "ui/app_list/app_list_model_observer.h"
 #include "ui/views/bubble/bubble_delegate.h"
 
 namespace views {
 class Widget;
 }
 
 namespace app_list {
 class ApplicationDragAndDropHost;
 class AppListMainView;
 class AppListModel;
 class AppListViewDelegate;
 class PaginationModel;
 class SigninDelegate;
 class SigninView;
 
 // AppListView is the top-level view and controller of app list UI. It creates
 // and hosts a AppsGridView and passes AppListModel to it for display.
 class APP_LIST_EXPORT AppListView : public views::BubbleDelegateView,
-                                    public SigninDelegateObserver {
+                                    public AppListModelObserver {
  public:
   // Takes ownership of |delegate|.
   explicit AppListView(AppListViewDelegate* delegate);
   virtual ~AppListView();
 
   // Initializes the widget.
   void InitAsBubble(gfx::NativeView parent,
                     PaginationModel* pagination_model,
                     views::View* anchor,
                     const gfx::Point& anchor_point,
@@ skipping 45 matching lines @@
   virtual bool AcceleratorPressed(const ui::Accelerator& accelerator) OVERRIDE;
   virtual void Layout() OVERRIDE;
 
   // Overridden from views::WidgetObserver:
   virtual void OnWidgetDestroying(views::Widget* widget) OVERRIDE;
   virtual void OnWidgetVisibilityChanged(
       views::Widget* widget, bool visible) OVERRIDE;
   virtual void OnWidgetActivationChanged(
       views::Widget* widget, bool active) OVERRIDE;
 
-  // Overridden from SigninDelegateObserver:
-  virtual void OnSigninSuccess() OVERRIDE;
+  // Overridden from AppListModelObserver:
+  virtual void OnAppListModelSigninStatusChanged() OVERRIDE;
+  virtual void OnAppListModelCurrentUserChanged() OVERRIDE;
 
   SigninDelegate* GetSigninDelegate();
 
   scoped_ptr<AppListModel> model_;
   scoped_ptr<AppListViewDelegate> delegate_;
 
   AppListMainView*  app_list_main_view_;
   SigninView* signin_view_;
 
   DISALLOW_COPY_AND_ASSIGN(AppListView);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_VIEWS_APP_LIST_VIEW_H_