Extract gpu line dashing to GrDashLinePathRenderer

src/gpu/GrStrokeInfo.h

Index: src/gpu/GrStrokeInfo.h
diff --git a/src/gpu/GrStrokeInfo.h b/src/gpu/GrStrokeInfo.h
index 2bd056ea3cadba0e77d35bb50f42a9f9d0dea3af..dd942c52e96be8ba39fd2f1f3e14c20cd80bdd87 100644
--- a/src/gpu/GrStrokeInfo.h
+++ b/src/gpu/GrStrokeInfo.h
@@ -44,6 +44,15 @@ public:
         this->init(paint);
     }
 
+    GrStrokeInfo& operator=(const GrStrokeInfo& other) {
+        fStroke = other.fStroke;
+        fDashInfo = other.fDashInfo;
+        fDashType = other.fDashType;
+        fIntervals.reset(other.dashCount());
+        memcpy(fIntervals.get(), other.fIntervals.get(), other.dashCount() * sizeof(SkScalar));
+        return *this;
+    }
+
     const SkStrokeRec& getStrokeRec() const { return fStroke; }
 
     SkStrokeRec* getStrokeRecPtr() { return &fStroke; }
@@ -73,6 +82,8 @@ public:
         return (!fStroke.isFillStyle() && SkPathEffect::kDash_DashType == fDashType);
     }
 
+    bool isFillStyle() const { return fStroke.isFillStyle(); }
+
     int32_t dashCount() const {
         return fDashInfo.fCount;
     }
@@ -83,6 +94,14 @@ public:
     
     const SkPathEffect::DashInfo& getDashInfo() const { return fDashInfo; }
 
+    /** Applies the dash to a path, if the stroke info has dashing.
+     * @return true if the dash ingwas applied (dst and dstStrokeInfo will be modified).
+     *         false if the stroke info did not have dashing. The dst and dstStrokeInfo
+     *               will be unmodified. The stroking in the SkStrokeRec might still
+     *               be applicable.
+     */
+    bool applyDash(SkPath* dst, GrStrokeInfo* dstStrokeInfo, const SkPath& src) const;
+
 private:
 
     void init(const SkPaint& paint) {