Implemented prototype for new ink drop specs.

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.
-
-#include "base/callback.h"
-#include "base/macros.h"
-#include "third_party/skia/include/core/SkColor.h"
-#include "ui/compositor/layer_delegate.h"
-#include "ui/compositor/paint_context.h"
-#include "ui/gfx/geometry/rect.h"
-
-namespace ui {
-class Layer;
-}  // namespace ui
-
-namespace views {
-
-// Renders the visual feedback for an ink drop animation. Will render a circle
-// if |circle_| is true, otherwise renders a rounded rectangle.
-class InkDropDelegate : public ui::LayerDelegate {
- public:
-  InkDropDelegate(ui::Layer* layer,
-                  SkColor color,
-                  int circle_radius,
-                  int rounded_rect_corner_radius);
-  ~InkDropDelegate() override;
-
-  // Sets the visual style of the feedback.
-  void set_should_render_circle(bool should_render_circle) {
-    should_render_circle_ = should_render_circle;
-  }
-
-  bool should_render_circle() const { return should_render_circle_; }
-
-  // ui::LayerDelegate:
-  void OnPaintLayer(const ui::PaintContext& context) override;
-  void OnDelegatedFrameDamage(const gfx::Rect& damage_rect_in_dip) override;
-  void OnDeviceScaleFactorChanged(float device_scale_factor) override;
-  base::Closure PrepareForLayerBoundsChange() override;
-
- private:
-  // The ui::Layer being rendered to.
-  ui::Layer* layer_;
-
-  // The color to paint.
-  SkColor color_;
-
-  // When true renders a circle, otherwise renders a rounded rectangle.
-  bool should_render_circle_;
-
-  // The radius of the circle.
-  const int circle_radius_;
-
-  // The radius of the rounded rectangles corners.
-  const int rounded_rect_corner_radius_;
-
-  DISALLOW_COPY_AND_ASSIGN(InkDropDelegate);
-};
-
-}  // namespace views