Implement FloatRect::squaredDistanceTo function

third_party/WebKit/Source/platform/geometry/FloatRect.cpp

Index: third_party/WebKit/Source/platform/geometry/FloatRect.cpp
diff --git a/third_party/WebKit/Source/platform/geometry/FloatRect.cpp b/third_party/WebKit/Source/platform/geometry/FloatRect.cpp
index 13c4b815ff075a05fdba414b6d9e395ed78e6e63..0c8aa19c732acf19dfec599dc16602f6e95193ce 100644
--- a/third_party/WebKit/Source/platform/geometry/FloatRect.cpp
+++ b/third_party/WebKit/Source/platform/geometry/FloatRect.cpp
@@ -171,6 +171,14 @@ void FloatRect::scale(float sx, float sy)
     m_size.setHeight(height() * sy);
 }
 
+float FloatRect::distanceTo(const FloatPoint& point) const

[fs, 2016/01/13 14:36:17]

squaredDistanceTo

+{
+    FloatPoint closestPoint;
+    closestPoint.setX(clampTo<float>(point.x(), this->minXMinYCorner().x(), this->maxX()));

[fs, 2016/01/13 14:36:17]

With this formulation minXMinYCorner() doesn't help in anyway - just use x()
(and ditto y()). Also, drop "this->". The (explicit) template argument should be
needed either I think.

+    closestPoint.setY(clampTo<float>(point.y(), this->minXMinYCorner().y(), this->maxY()));
+    return (point - closestPoint).diagonalLengthSquared();
+}
+
 FloatRect unionRect(const Vector<FloatRect>& rects)
 {
     FloatRect result;