cc: Apply the layer's initial CSS scale to the contentsScale to render text at the right resolution.

cc/CCMathUtil.cpp

Index: cc/CCMathUtil.cpp
diff --git a/cc/CCMathUtil.cpp b/cc/CCMathUtil.cpp
index d90eb090abef6fbc004f87cedc0a3188419486cf..0a2b2070179c2afbfd2cddd70b62127a228aadc9 100644
--- a/cc/CCMathUtil.cpp
+++ b/cc/CCMathUtil.cpp
@@ -9,6 +9,7 @@
 #include "FloatPoint.h"
 #include "FloatQuad.h"
 #include "IntRect.h"
+#include <math.h>
 #include <public/WebTransformationMatrix.h>
 
 using WebKit::WebTransformationMatrix;
@@ -376,4 +377,9 @@ FloatSize CCMathUtil::projectVector(const FloatSize& source, const FloatSize& de
     return FloatSize(projectedLength * destination.width(), projectedLength * destination.height());
 }
 
+float CCMathUtil::distanceBetweenPoints(const FloatPoint& p1, const FloatPoint& p2)
+{
+    return sqrtf((p1.x() - p2.x()) * (p1.x() - p2.x()) + (p1.y() - p2.y()) * (p1.y() - p2.y()));
+}
+
 } // namespace cc