ash: Remove WmShelf::IsShowingOverflowBubble

ash/common/shelf/shelf_view.h

Index: ash/common/shelf/shelf_view.h
diff --git a/ash/common/shelf/shelf_view.h b/ash/common/shelf/shelf_view.h
index e5f0deccc63facb1725cd21d852addcf377e3cc0..a8be074bf63d30942bdfaac5beab94f06081db93 100644
--- a/ash/common/shelf/shelf_view.h
+++ b/ash/common/shelf/shelf_view.h
@@ -122,6 +122,11 @@ class ASH_EXPORT ShelfView : public views::View,
   // coordinate system.
   gfx::Rect GetVisibleItemsBoundsInScreen();
 
+  // InkDropButtonListener:
+  void ButtonPressed(views::Button* sender,
+                     const ui::Event& event,
+                     views::InkDrop* ink_drop) override;
+
   // Overridden from FocusTraversable:
   views::FocusSearch* GetFocusSearch() override;
   FocusTraversable* GetFocusTraversableParent() override;
@@ -292,11 +297,6 @@ class ASH_EXPORT ShelfView : public views::View,
   void OnSetShelfItemDelegate(ShelfID id,
                               ShelfItemDelegate* item_delegate) override;
 
-  // Overridden from InkDropButtonListener:
-  void ButtonPressed(views::Button* sender,
-                     const ui::Event& event,
-                     views::InkDrop* ink_drop) override;
-
   // Show a list of all running items for this shelf |item|; it only shows a
   // menu if there are multiple running items. |source| specifies the view
   // responsible for showing the menu, and the bubble will point towards it.