add Method param to drawTextOnPath, supporting SVG spec

src/pipe/SkGPipeWrite.cpp

Index: src/pipe/SkGPipeWrite.cpp
diff --git a/src/pipe/SkGPipeWrite.cpp b/src/pipe/SkGPipeWrite.cpp
index be687f7d313932cacc2f8b59f920bc232370e8d1..be6f2c307b05e41a450633ae27b714c8ce514761 100644
--- a/src/pipe/SkGPipeWrite.cpp
+++ b/src/pipe/SkGPipeWrite.cpp
@@ -257,7 +257,8 @@ protected:
     virtual void onDrawPosTextH(const void* text, size_t byteLength, const SkScalar xpos[],
                                 SkScalar constY, const SkPaint&) SK_OVERRIDE;
     virtual void onDrawTextOnPath(const void* text, size_t byteLength, const SkPath& path,
-                                  const SkMatrix* matrix, const SkPaint&) SK_OVERRIDE;
+                                  const SkMatrix*,
+                                 SK_SUPPORT_LEGACY_DRAWTEXTONPATH_PARAM const SkPaint&) SK_OVERRIDE;
     virtual void onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y,
                                 const SkPaint& paint) SK_OVERRIDE;
     virtual void onDrawPatch(const SkPoint cubics[12], const SkColor colors[4],
@@ -872,7 +873,9 @@ void SkGPipeCanvas::onDrawPosTextH(const void* text, size_t byteLength, const Sk
 }
 
 void SkGPipeCanvas::onDrawTextOnPath(const void* text, size_t byteLength, const SkPath& path,
-                                     const SkMatrix* matrix, const SkPaint& paint) {
+                                     const SkMatrix* matrix,
+                                     SK_SUPPORT_LEGACY_DRAWTEXTONPATH_PARAM const SkPaint& paint) {
+    SK_SUPPORT_LEGACY_DRAWTEXTONPATH_DEFAULT_METHOD
     if (byteLength) {
         NOTIFY_SETUP(this);
         unsigned flags = 0;
@@ -892,6 +895,7 @@ void SkGPipeCanvas::onDrawTextOnPath(const void* text, size_t byteLength, const
             if (matrix) {
                 fWriter.writeMatrix(*matrix);
             }
+            fWriter.write32(method);
         }
     }
 }