Fixing the dynamic positioning (move with anchor) for the app launcher

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 53d08a40dd7c08bea30d3111270834603f8f859c..a6c7def8a500208d8be02bcadd65af981353d64c 100644
--- a/ui/app_list/views/app_list_view.h
+++ b/ui/app_list/views/app_list_view.h
@@ -39,13 +39,22 @@ class APP_LIST_EXPORT AppListView : public views::BubbleDelegateView,
   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,
-                    views::BubbleBorder::Arrow arrow,
-                    bool border_accepts_events);
+  // Initializes the widget and use a given |anchor| plus an |anchor_offset| for
+  // positioning.
+  void InitAsBubbleAttachedToAnchor(gfx::NativeView parent,
+                                    PaginationModel* pagination_model,
+                                    views::View* anchor,
+                                    const gfx::Point& anchor_offset,
+                                    views::BubbleBorder::Arrow arrow,
+                                    bool border_accepts_events);
+
+  // Initializes the widget and use a fixed |anchor_point_in_screen| for
+  // positioning.
+  void InitAsBubbleAtFixedLocation(gfx::NativeView parent,
+                                   PaginationModel* pagination_model,
+                                   const gfx::Point& anchor_point_in_screen,
+                                   views::BubbleBorder::Arrow arrow,
+                                   bool border_accepts_events);
 
   void SetBubbleArrow(views::BubbleBorder::Arrow arrow);
 
@@ -89,6 +98,11 @@ class APP_LIST_EXPORT AppListView : public views::BubbleDelegateView,
 #endif
 
  private:
+  void InitAsBubbleInternal(gfx::NativeView parent,
+                            PaginationModel* pagination_model,
+                            views::BubbleBorder::Arrow arrow,
+                            bool border_accepts_events);
+
   // Overridden from views::WidgetDelegateView:
   virtual views::View* GetInitiallyFocusedView() OVERRIDE;
   virtual gfx::ImageSkia GetWindowIcon() OVERRIDE;