[ash-md] Animates ToggleButton highlight to move it in sync with the thumb

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"
@@ skipping 16 matching lines @@
 class VIEWS_EXPORT InkDropHostView : public View, public InkDropHost {
  public:
   InkDropHostView();
   ~InkDropHostView() override;
 
   // 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<InkDropHighlight> CreateInkDropHighlight() const override;
+  void OffsetInkDropRipple(const gfx::Vector2d& offset) override;
 
   void set_ink_drop_size(const gfx::Size& size) { ink_drop_size_ = size; }
 
  protected:
   // Used in SetInkDropMode() to specify whether the ink drop effect is enabled
   // or not for the view. In case of having an ink drop, it also specifies
   // whether the default gesture event handler for the ink drop should be
   // installed or the subclass will handle gesture events itself.
   enum class InkDropMode {
     OFF,
@@ skipping 56 matching lines @@
 
   // The last user Event to trigger an ink drop ripple animation.
   std::unique_ptr<ui::LocatedEvent> last_ripple_triggering_event_;
 
   std::unique_ptr<InkDrop> ink_drop_;
 
   // Intentionally declared after |ink_drop_| so that it doesn't access a
   // destroyed |ink_drop_| during destruction.
   std::unique_ptr<InkDropGestureHandler> gesture_handler_;
 
+  // Cached ink drop layer.
+  ui::Layer* ink_drop_layer_;
+
   gfx::Size ink_drop_size_;
 
   float ink_drop_visible_opacity_;
 
   // Determines whether the view was already painting to layer before adding ink
   // drop layer.
   bool old_paint_to_layer_;
 
   bool destroying_;
 
   DISALLOW_COPY_AND_ASSIGN(InkDropHostView);
 };
 }  // namespace views
 
 #endif  // UI_VIEWS_ANIMATION_INK_DROP_HOST_VIEW_H_