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

ui/gfx/geometry/rect.h

Index: ui/gfx/geometry/rect.h
diff --git a/ui/gfx/geometry/rect.h b/ui/gfx/geometry/rect.h
index beb6242318e3c33f4d973f4bfa36997130d9998f..fddf07df8f2807bc3b6105c1f509082731897f41 100644
--- a/ui/gfx/geometry/rect.h
+++ b/ui/gfx/geometry/rect.h
@@ -177,6 +177,9 @@ class GFX_EXPORT Rect {
   // returns the smallest non-zero value appropriate for int.
   int ManhattanInternalDistance(const Rect& rect) const;
 
+  // Returns the largest distance from |point| to the corners of |this|.
+  float MaxDistanceToCorners(const gfx::Point& point) const;
+
   std::string ToString() const;
 
   bool ApproximatelyEqual(const Rect& rect, int tolerance) const;