Add ink drop ripple to status tray

ui/views/animation/ink_drop_mask.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_INK_DROP_MASK_H_
 #define UI_VIEWS_ANIMATION_INK_DROP_MASK_H_
 
 #include "base/macros.h"
 #include "ui/compositor/layer.h"
 #include "ui/compositor/layer_delegate.h"
+#include "ui/gfx/geometry/insets.h"
 #include "ui/gfx/geometry/point.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/views/views_export.h"
 
 namespace views {
 
 // Base class for different ink drop masks. It is responsible for creating the
-// ui::Layer that can be set as the mask layer for ink drop layer.
+// ui::Layer that can be set as the mask layer for ink drop layer. Note that the
+// mask's layer size (passed in the constructor) should always match size of the
+// layer it is masking.
 class VIEWS_EXPORT InkDropMask : public ui::LayerDelegate {
  public:
   ~InkDropMask() override;
 
+  // Should be called whenever the masked layer is resized so that the mask
+  // layer size always matches that of the layer it is masking.
+  void UpdateLayerSize(const gfx::Size& new_layer_size);
+
   ui::Layer* layer() { return &layer_; }
 
  protected:
   explicit InkDropMask(const gfx::Size& layer_size);
 
  private:
   // Overriden from ui::LayerDelegate:
   void OnDelegatedFrameDamage(const gfx::Rect& damage_rect_in_dip) override;
 
   void OnDeviceScaleFactorChanged(float device_scale_factor) override;
 
   ui::Layer layer_;
 
   DISALLOW_COPY_AND_ASSIGN(InkDropMask);
 };
 
 // A rectangular ink drop mask with rounded corners.
 class VIEWS_EXPORT RoundRectInkDropMask : public InkDropMask {
  public:
   RoundRectInkDropMask(const gfx::Size& layer_size,
-                       const gfx::Rect& mask_bounds,
+                       const gfx::Insets& mask_insets,
                        int corner_radius);
 
  private:
   // Overriden from InkDropMask:
   void OnPaintLayer(const ui::PaintContext& context) override;
 
-  gfx::Rect mask_bounds_;
+  gfx::Insets mask_insets_;
   int corner_radius_;
 
   DISALLOW_COPY_AND_ASSIGN(RoundRectInkDropMask);
 };
 
 // A circular ink drop mask.
 class VIEWS_EXPORT CircleInkDropMask : public InkDropMask {
  public:
   CircleInkDropMask(const gfx::Size& layer_size,
                     const gfx::Point& mask_center,
                     int mask_radius);
 
  private:
   // Overriden from InkDropMask:
   void OnPaintLayer(const ui::PaintContext& context) override;
 
   gfx::Point mask_center_;
   int mask_radius_;
 
   DISALLOW_COPY_AND_ASSIGN(CircleInkDropMask);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_ANIMATION_INK_DROP_MASK_H_