Move signin status and current user information into AppListModel.

ui/app_list/views/app_list_view.h

Index: ui/app_list/views/app_list_view.h
diff --git a/ui/app_list/views/app_list_view.h b/ui/app_list/views/app_list_view.h
index eb21ceb3ed654417e46415704c500405ec5e046e..3a1493e3b2ddd194be80a4628e64f6f80d6127c7 100644
--- a/ui/app_list/views/app_list_view.h
+++ b/ui/app_list/views/app_list_view.h
@@ -7,7 +7,7 @@
 
 #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 {
@@ -26,7 +26,7 @@ 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);
@@ -88,8 +88,9 @@ class APP_LIST_EXPORT AppListView : public views::BubbleDelegateView,
   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();