add backdrop option to SaveLayerRec

src/core/SkRecorder.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 "SkBigPicture.h"
 #include "SkCanvasPriv.h"
 #include "SkPatchUtils.h"
@@ skipping 319 matching lines @@
            count,
            mode,
            this->copy(cull));
 }
 
 void SkRecorder::willSave() {
     APPEND(Save);
 }
 
 SkCanvas::SaveLayerStrategy SkRecorder::getSaveLayerStrategy(const SaveLayerRec& rec) {
-    APPEND(SaveLayer, this->copy(rec.fBounds), this->copy(rec.fPaint), rec.fSaveLayerFlags);
+    APPEND(SaveLayer,
+           this->copy(rec.fBounds), this->copy(rec.fPaint), rec.fBackdrop, rec.fSaveLayerFlags);
     return SkCanvas::kNoLayer_SaveLayerStrategy;
 }
 
 void SkRecorder::didRestore() {
     APPEND(Restore, this->devBounds(), this->getTotalMatrix());
 }
 
 void SkRecorder::didConcat(const SkMatrix& matrix) {
     APPEND(Concat, matrix);
 }
@@ skipping 18 matching lines @@
     INHERITED(onClipPath, path, op, edgeStyle);
     SkRecords::RegionOpAndAA opAA(op, kSoft_ClipEdgeStyle == edgeStyle);
     APPEND(ClipPath, this->devBounds(), path, opAA);
 }
 
 void SkRecorder::onClipRegion(const SkRegion& deviceRgn, SkRegion::Op op) {
     INHERITED(onClipRegion, deviceRgn, op);
     APPEND(ClipRegion, this->devBounds(), deviceRgn, op);
 }