Set resScale on stroker when stroking path on gpu.

include/core/SkStrokeRec.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkStrokeRec_DEFINED
 #define SkStrokeRec_DEFINED
 
@@ skipping 46 matching lines @@
      *      strokeAndFill==false -> new style will be Hairline
      */
     void setStrokeStyle(SkScalar width, bool strokeAndFill = false);
 
     void setStrokeParams(SkPaint::Cap cap, SkPaint::Join join, SkScalar miterLimit) {
         fCap = cap;
         fJoin = join;
         fMiterLimit = miterLimit;
     }
 
+    void setResScale(SkScalar rs) {
+        SkASSERT(rs > 0 && SkScalarIsFinite(rs));
+        fResScale = rs;
+    }
+
     /**
      *  Returns true if this specifes any thick stroking, i.e. applyToPath()
      *  will return true.
      */
     bool needToApply() const {
         Style style = this->getStyle();
         return (kStroke_Style == style) || (kStrokeAndFill_Style == style);
     }
 
     /**
@@ skipping 26 matching lines @@
 
     SkScalar        fResScale;
     SkScalar        fWidth;
     SkScalar        fMiterLimit;
     SkPaint::Cap    fCap;
     SkPaint::Join   fJoin;
     bool            fStrokeAndFill;
 };
 
 #endif