Moved ButtonInkDropDelegate logic into InkDropHostView and deleted InkDropDelegates.

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_