Revert of add backdrop option to SaveLayerRec

src/core/SkRecorder.cpp

Index: src/core/SkRecorder.cpp
diff --git a/src/core/SkRecorder.cpp b/src/core/SkRecorder.cpp
index 01c28dfc2b49ebcf8bedd8e1069c224c9dda1d74..67429a691edea364d9073ecd805f4a5a60823e16 100644
--- a/src/core/SkRecorder.cpp
+++ b/src/core/SkRecorder.cpp
@@ -337,8 +337,7 @@
 }
 
 SkCanvas::SaveLayerStrategy SkRecorder::getSaveLayerStrategy(const SaveLayerRec& rec) {
-    APPEND(SaveLayer,
-           this->copy(rec.fBounds), this->copy(rec.fPaint), rec.fBackdrop, rec.fSaveLayerFlags);
+    APPEND(SaveLayer, this->copy(rec.fBounds), this->copy(rec.fPaint), rec.fSaveLayerFlags);
     return SkCanvas::kNoLayer_SaveLayerStrategy;
 }