option to return drawable from recording

src/gpu/GrRecordReplaceDraw.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrRecordReplaceDraw.h"
 #include "SkCanvasPriv.h"
 #include "SkImage.h"
@@ skipping 42 matching lines @@
 // Used by GrRecordReplaceDraw. It intercepts nested drawPicture calls and
 // also draws them with replaced layers.
 class ReplaceDraw : public SkRecords::Draw {
 public:
     ReplaceDraw(SkCanvas* canvas,
                 SkPicture const* const drawablePicts[], int drawableCount,
                 const SkPicture* picture,
                 const GrReplacements* replacements,
                 const SkMatrix& initialMatrix,
                 SkDrawPictureCallback* callback)
-        : INHERITED(canvas, drawablePicts, drawableCount)
+        : INHERITED(canvas, drawablePicts, NULL, drawableCount)
         , fCanvas(canvas)
         , fPicture(picture)
         , fReplacements(replacements)
         , fInitialMatrix(initialMatrix)
         , fCallback(callback)
         , fIndex(0)
         , fNumReplaced(0) {
     }
 
     int draw() {
@@ skipping 107 matching lines @@
                         const GrReplacements* replacements,
                         const SkMatrix& initialMatrix,
                         SkDrawPictureCallback* callback) {
     SkAutoCanvasRestore saveRestore(canvas, true /*save now, restore at exit*/);
 
     // TODO: drawablePicts?
     ReplaceDraw draw(canvas, NULL, 0, picture, replacements, initialMatrix, callback);
 
     return draw.draw();
 }