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

ui/views/animation/ink_drop_host.h

 // Copyright 2015 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_H_
 #define UI_VIEWS_ANIMATION_INK_DROP_HOST_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 26 matching lines @@
 
   // Removes |ink_drop_layer| from the layer tree.
   virtual void RemoveInkDropLayer(ui::Layer* ink_drop_layer) = 0;
 
   // Creates and returns the effect used for press.
   virtual std::unique_ptr<InkDropRipple> CreateInkDropRipple() const = 0;
 
   // Creates and returns the effect used for hover and focus.
   virtual std::unique_ptr<InkDropHighlight> CreateInkDropHighlight() const = 0;
 
+  // Translates the root layer by |offset|.
+  virtual void OffsetInkDropRipple(const gfx::Vector2d& offset) = 0;

[bruthig, 2016/10/08 22:44:46]

I think it would be better to move this function into the InkDrop interface
instead of here.  All of the descendants of InkDropHostView would be able to
access the ink_drop_  anyway.

[varkha, 2016/10/12 00:44:59]

Acknowledged.

+
  private:
   DISALLOW_COPY_AND_ASSIGN(InkDropHost);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_ANIMATION_INK_DROP_HOST_H_