Hide hover effect on hidden ink drop host views.

ui/views/animation/ink_drop_host_view.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 UI_VIEWS_ANIMATION_INK_DROP_HOST_VIEW_H_
 #define UI_VIEWS_ANIMATION_INK_DROP_HOST_VIEW_H_
 
 #include <memory>
 
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/views/animation/ink_drop_delegate.h"
 #include "ui/views/animation/ink_drop_host.h"
 #include "ui/views/view.h"
 
 namespace views {
 
 class InkDropRipple;
 class InkDropHover;
 
 // A view that provides InkDropHost functionality.
 class VIEWS_EXPORT InkDropHostView : public View, public InkDropHost {
  public:
-  // Overridden from views::InkDropHost:
+  // Overridden from InkDropHost:
   void AddInkDropLayer(ui::Layer* ink_drop_layer) override;
   void RemoveInkDropLayer(ui::Layer* ink_drop_layer) override;
   std::unique_ptr<InkDropRipple> CreateInkDropRipple() const override;
   std::unique_ptr<InkDropHover> CreateInkDropHover() const override;
 
   void set_ink_drop_size(const gfx::Size& size) { ink_drop_size_ = size; }
 
   InkDropDelegate* ink_drop_delegate() { return ink_drop_delegate_.get(); }
 
  protected:
   InkDropHostView();
   ~InkDropHostView() override;
 
   static const int kInkDropSmallCornerRadius;
 
   // View
+  void VisibilityChanged(View* starting_from, bool is_visible) override;
   void OnFocus() override;
   void OnBlur() override;
 
   // Overrideable methods to allow views to provide minor tweaks to the default
   // ink drop.
   virtual gfx::Point GetInkDropCenter() const;
   virtual SkColor GetInkDropBaseColor() const;
 
   // Should return true if the ink drop is also used to depict focus.
   virtual bool ShouldShowInkDropForFocus() const;
 
   void set_ink_drop_delegate(std::unique_ptr<InkDropDelegate> delegate) {
     ink_drop_delegate_ = std::move(delegate);
   }
 
  private:
   std::unique_ptr<InkDropDelegate> ink_drop_delegate_;
   gfx::Size ink_drop_size_;
   bool destroying_;
 
   DISALLOW_COPY_AND_ASSIGN(InkDropHostView);
 };
 }  // namespace views
 
 #endif  // UI_VIEWS_ANIMATION_INK_DROP_HOST_VIEW_H_