Moved ButtonInkDropDelegate logic into InkDropHostView and deleted InkDropDelegates.

ui/views/animation/test/test_ink_drop_delegate.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_TEST_TEST_INK_DROP_DELEGATE_H_
-#define UI_VIEWS_ANIMATION_TEST_TEST_INK_DROP_DELEGATE_H_
-
-#include "base/macros.h"
-#include "base/memory/ptr_util.h"
-#include "ui/views/animation/ink_drop_delegate.h"
-
-namespace views {
-namespace test {
-
-class TestInkDropDelegate : public InkDropDelegate {
- public:
-  TestInkDropDelegate();
-  ~TestInkDropDelegate() override;
-
-  bool is_hovered() const { return is_hovered_; }
-
-  // InkDropDelegate:
-  void OnAction(InkDropState state) override;
-  void SnapToActivated() override;
-  void SetHovered(bool is_hovered) override;
-  InkDropState GetTargetInkDropState() const override;
-  InkDrop* GetInkDrop() override;
-
- private:
-  InkDropState state_;
-
-  bool is_hovered_;
-
-  std::unique_ptr<InkDrop> ink_drop_;
-
-  DISALLOW_COPY_AND_ASSIGN(TestInkDropDelegate);
-};
-
-}  // namespace test
-}  // namespace views
-
-#endif  // UI_VIEWS_ANIMATION_TEST_TEST_INK_DROP_DELEGATE_H_