Added material design mouse hover feedback support.

ui/views/animation/button_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_BUTTON_INK_DROP_DELEGATE_H_
 #define UI_VIEWS_ANIMATION_BUTTON_INK_DROP_DELEGATE_H_
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/events/event_handler.h"
@@ skipping 17 matching lines @@
   ButtonInkDropDelegate(InkDropHost* ink_drop_host, View* view);
   ~ButtonInkDropDelegate() override;
 
   // InkDropDelegate:
   void SetInkDropSize(int large_size,
                       int large_corner_radius,
                       int small_size,
                       int small_corner_radius) override;
   void OnLayout() override;
   void OnAction(InkDropState state) override;
+  void SetHovered(bool is_hovered) override;
 
   // ui::EventHandler:
   void OnGestureEvent(ui::GestureEvent* event) override;
 
  private:
   // An instance of ScopedTargetHandler allowing |this| to handle events.
   scoped_ptr<ui::ScopedTargetHandler> target_handler_;
 
   // Parent InkDropHost (typically a View) that hosts the ink ripple animations.
   InkDropHost* ink_drop_host_;
 
   // Animation controller for the ink drop ripple effect.
   scoped_ptr<InkDropAnimationController> ink_drop_animation_controller_;
 
   DISALLOW_COPY_AND_ASSIGN(ButtonInkDropDelegate);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_ANIMATION_BUTTON_INK_DROP_DELEGATE_H_