Replace GrStrokeInfo with GrStyle.

src/gpu/GrStyle.h

Index: src/gpu/GrStyle.h
diff --git a/src/gpu/GrStyle.h b/src/gpu/GrStyle.h
index 6166b56fb707eafffcc013b160b71dc0c1478247..07efb40866b91df4f9fbbfd9bef3763c0712d3e2 100644
--- a/src/gpu/GrStyle.h
+++ b/src/gpu/GrStyle.h
@@ -85,6 +85,11 @@ public:
         this->initPathEffect(paint.getPathEffect());
     }
 
+    explicit GrStyle(const SkPaint& paint, SkPaint::Style overrideStyle)
+            : fStrokeRec(paint, overrideStyle) {
+        this->initPathEffect(paint.getPathEffect());
+    }
+
     GrStyle& operator=(const GrStyle& that) {
         fPathEffect = that.fPathEffect;
         fDashInfo = that.fDashInfo;
@@ -133,6 +138,12 @@ public:
         return this->pathEffect() || (!fStrokeRec.isFillStyle() && !fStrokeRec.isHairlineStyle());
     }
 
+    static SkScalar MatrixToScaleFactor(const SkMatrix& matrix) {
+        // getMaxScale will return -1 if the matrix has perspective. In that case we can use a scale
+        // factor of 1. This isn't necessarily a good choice and in the future we might consider
+        // taking a bounds here for the perspective case.
+        return SkScalarAbs(matrix.getMaxScale());
+    }
     /**
      * Applies just the path effect and returns remaining stroke information. This will fail if
      * there is no path effect. dst may or may not have been overwritten on failure. Scale controls