Use ink drop hover for focus states on toolbar buttons and location

ui/views/animation/ink_drop_delegate.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_DELEGATE_H_
 #define UI_VIEWS_ANIMATION_INK_DROP_DELEGATE_H_
 
 #include "base/macros.h"
 #include "ui/views/animation/ink_drop_state.h"
 #include "ui/views/views_export.h"
 
 namespace ui {
 class GestureEvent;
 class Event;
 }  // namespace ui
 
 namespace views {
 
+class InkDrop;
+
 // Ink ripple animation delegate that starts and stops animations based on
 // View states and events.
 class VIEWS_EXPORT InkDropDelegate {
  public:
   InkDropDelegate() {}
   virtual ~InkDropDelegate() {}
 
   // Called when ink ripple state changes.
   // TODO(bruthig): Replace the InkDropState parameter with an InkDropAction
   // enum.  The InkDropAction enum should be a subset of the InkDropState values
   // as well as a NONE value.
   virtual void OnAction(InkDropState state) = 0;
 
   // Immediately snaps the InkDropState to ACTIVATED.
   virtual void SnapToActivated() = 0;
 
   // Enables or disables the hover state.
   virtual void SetHovered(bool is_hovered) = 0;
 
   // Returns the current InkDropState
   virtual InkDropState GetTargetInkDropState() const = 0;
 
+  // Returns the ink drop that this delegate controls. TODO(estade): remove the
+  // above pass throughs and convert callers to using this function.
+  virtual InkDrop* GetInkDrop() = 0;
+
  private:
   DISALLOW_COPY_AND_ASSIGN(InkDropDelegate);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_ANIMATION_INK_DROP_DELEGATE_H_