update textblob api to use sk_sp

include/core/SkCanvas.h

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkCanvas_DEFINED
 #define SkCanvas_DEFINED
 
@@ skipping 1053 matching lines @@
     void drawTextRSXform(const void* text, size_t byteLength, const SkRSXform[],
                          const SkRect* cullRect, const SkPaint& paint);
 
     /** Draw the text blob, offset by (x,y), using the specified paint.
         @param blob     The text blob to be drawn
         @param x        The x-offset of the text being drawn
         @param y        The y-offset of the text being drawn
         @param paint    The paint used for the text (e.g. color, size, style)
     */
     void drawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y, const SkPaint& paint);
+    void drawTextBlob(const sk_sp<SkTextBlob>& blob, SkScalar x, SkScalar y, const SkPaint& paint) {
+        this->drawTextBlob(blob.get(), x, y, paint);
+    }
 
     /** Draw the picture into this canvas. This method effective brackets the
         playback of the picture's draw calls with save/restore, so the state
         of this canvas will be unchanged after this call.
         @param picture The recorded drawing commands to playback into this
                        canvas.
     */
     void drawPicture(const SkPicture* picture) {
         this->drawPicture(picture, NULL, NULL);
     }
@@ skipping 634 matching lines @@
 
 class SkCanvasClipVisitor {
 public:
     virtual ~SkCanvasClipVisitor();
     virtual void clipRect(const SkRect&, SkRegion::Op, bool antialias) = 0;
     virtual void clipRRect(const SkRRect&, SkRegion::Op, bool antialias) = 0;
     virtual void clipPath(const SkPath&, SkRegion::Op, bool antialias) = 0;
 };
 
 #endif