Centered flood fill style ink drop ripples on mouse/touch points.

ui/views/animation/flood_fill_ink_drop_ripple.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_FLOOD_FILL_INK_DROP_RIPPLE_H_
 #define UI_VIEWS_ANIMATION_FLOOD_FILL_INK_DROP_RIPPLE_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 83 matching lines @@
       gfx::Tween::Type tween,
       ui::LayerAnimationObserver* observer);
 
   // Returns the Transform to be applied to the |painted_layer_| for the given
   // |target_radius|.
   gfx::Transform CalculateTransform(float target_radius) const;
 
   // Returns the target Transform for when the ink drop is fully shown.
   gfx::Transform GetMaxSizeTargetTransform() const;
 
+  // Returns the largest distance from |point| to the corners of the
+  // |root_layer_| bounds.
+  float MaxDistanceToCorners(const gfx::Point& point) const;
+
   // The point where the Center of the ink drop's circle should be drawn.
   gfx::Point center_point_;
 
   // The root layer that parents the animating layer. The root layer is used to
   // manipulate opacity and clipping bounds, and it child is used to manipulate
   // the different shape of the ink drop.
   ui::Layer root_layer_;
 
   // ui::LayerDelegate to paint the |painted_layer_|.
   CircleLayerDelegate circle_layer_delegate_;
 
   // Child ui::Layer of |root_layer_|. Used to  manipulate the different size
   // and shape of the ink drop.
   ui::Layer painted_layer_;
 
   // The current ink drop state.
   InkDropState ink_drop_state_;
 
   DISALLOW_COPY_AND_ASSIGN(FloodFillInkDropRipple);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_ANIMATION_FLOOD_FILL_INK_DROP_RIPPLE_H_