Extract gpu line dashing to GrDashLinePathRenderer

src/gpu/GrStrokeInfo.cpp

Index: src/gpu/GrStrokeInfo.cpp
diff --git a/src/gpu/GrStrokeInfo.cpp b/src/gpu/GrStrokeInfo.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..30f4b8931e4bbf680cac9b4f6886d277a243c742
--- /dev/null
+++ b/src/gpu/GrStrokeInfo.cpp
@@ -0,0 +1,23 @@
+/*
+ * Copyright 2015 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "GrStrokeInfo.h"
+
+#include "SkDashPathPriv.h"
+
+bool GrStrokeInfo::applyDash(SkPath* dst, GrStrokeInfo* dstStrokeInfo, const SkPath& src) const {
+    if (this->isDashed()) {
+        const SkPathEffect::DashInfo& info = this->getDashInfo();
+        SkStrokeRec strokeRec = fStroke;
+        if (SkDashPath::FilterDashPath(dst, src, &strokeRec, NULL, info)) {
+            dstStrokeInfo->fStroke = strokeRec;
+            dstStrokeInfo->removeDash();
+            return true;
+        }
+    }
+    return false;
+}