use SkScalar instead of float

src/core/SkGeometry.h

Index: src/core/SkGeometry.h
diff --git a/src/core/SkGeometry.h b/src/core/SkGeometry.h
index 119cfc68db54f31e328126a582ac2af34bae12fa..50756437504bc0148f0cf0a7d052e1230a68ef78 100644
--- a/src/core/SkGeometry.h
+++ b/src/core/SkGeometry.h
@@ -76,7 +76,7 @@ int SkChopQuadAtXExtrema(const SkPoint src[3], SkPoint dst[5]);
     curvature exists on the segment, returns the t value for this
     point along the curve. Otherwise it will return a value of 0.
 */
-float SkFindQuadMaxCurvature(const SkPoint src[3]);
+SkScalar SkFindQuadMaxCurvature(const SkPoint src[3]);
 
 /** Given 3 points on a quadratic bezier, divide it into 2 quadratics
     if the point of maximum curvature exists on the quad segment.