ash: Remove WmShelf::IsShowingOverflowBubble

ash/aura/wm_shelf_aura.h

 // Copyright 2016 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 ASH_AURA_WM_SHELF_AURA_H_
 #define ASH_AURA_WM_SHELF_AURA_H_
 
 #include "ash/ash_export.h"
 #include "ash/common/shelf/shelf_icon_observer.h"
 #include "ash/common/shelf/wm_shelf.h"
@@ skipping 32 matching lines @@
   WmWindow* GetWindow() override;
   ShelfAlignment GetAlignment() const override;
   void SetAlignment(ShelfAlignment alignment) override;
   ShelfAutoHideBehavior GetAutoHideBehavior() const override;
   void SetAutoHideBehavior(ShelfAutoHideBehavior behavior) override;
   ShelfAutoHideState GetAutoHideState() const override;
   void UpdateAutoHideState() override;
   ShelfBackgroundType GetBackgroundType() const override;
   WmDimmerView* CreateDimmerView(bool disable_animations_for_test) override;
   bool IsDimmed() const override;
-  bool IsShowingOverflowBubble() const override;
   void SchedulePaint() override;
   bool IsVisible() const override;
   void UpdateVisibilityState() override;
   ShelfVisibilityState GetVisibilityState() const override;
   gfx::Rect GetIdealBounds() override;
   gfx::Rect GetUserWorkAreaBounds() const override;
   void UpdateIconPositionForWindow(WmWindow* window) override;
   gfx::Rect GetScreenBoundsOfItemIconForWindow(WmWindow* window) override;
   bool ProcessGestureEvent(const ui::GestureEvent& event) override;
   void AddObserver(WmShelfObserver* observer) override;
@@ skipping 22 matching lines @@
 
   // Forwards mouse and gesture events to ShelfLayoutManager for auto-hide.
   std::unique_ptr<AutoHideEventHandler> auto_hide_event_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(WmShelfAura);
 };
 
 }  // namespace ash
 
 #endif  // ASH_AURA_WM_SHELF_AURA_H_