add Method param to drawTextOnPath, supporting SVG spec

src/svg/SkSVGDevice.cpp

 /*
  * 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 "SkSVGDevice.h"
 
 #include "SkBitmap.h"
@@ skipping 600 matching lines @@
     if (scalarsPerPos != 2) {
         yStr.appendScalar(offset.y());
     }
 
     elem.addAttribute("x", xStr);
     elem.addAttribute("y", yStr);
     elem.addText(svg_text(text, len, paint));
 }
 
 void SkSVGDevice::drawTextOnPath(const SkDraw&, const void* text, size_t len, const SkPath& path,
-                                 const SkMatrix* matrix, const SkPaint& paint) {
+                                 const SkMatrix* matrix, SK_SUPPORT_LEGACY_DRAWTEXTONPATH_PARAM
+                                 const SkPaint& paint) {
     SkString pathID = fResourceBucket->addPath();
 
     {
         AutoElement defs("defs", fWriter);
         AutoElement pathElement("path", fWriter);
         pathElement.addAttribute("id", pathID);
         pathElement.addPathAttributes(path);
 
     }
 
@@ skipping 28 matching lines @@
                                const SkPaint& paint) {
     // todo
     SkDebugf("unsupported operation: drawVertices()\n");
 }
 
 void SkSVGDevice::drawDevice(const SkDraw&, SkBaseDevice*, int x, int y,
                              const SkPaint&) {
     // todo
     SkDebugf("unsupported operation: drawDevice()\n");
 }