Add flag for drawing layers to screen with Ganesh

cc/resources/picture.cc

Index: cc/resources/picture.cc
diff --git a/cc/resources/picture.cc b/cc/resources/picture.cc
index 37946055ae16d6dcfdaa1a09d452a632d17a1ceb..748e404166b6a0f676e3c41242ccdda7828176fa 100644
--- a/cc/resources/picture.cc
+++ b/cc/resources/picture.cc
@@ -253,15 +253,11 @@ void Picture::Record(ContentLayerClient* painter,
   canvas->translate(SkFloatToScalar(-layer_rect_.x()),
                     SkFloatToScalar(-layer_rect_.y()));
 
-  SkPaint paint;
-  paint.setAntiAlias(false);
-  paint.setXfermodeMode(SkXfermode::kClear_Mode);
   SkRect layer_skrect = SkRect::MakeXYWH(layer_rect_.x(),
                                          layer_rect_.y(),
                                          layer_rect_.width(),
                                          layer_rect_.height());
   canvas->clipRect(layer_skrect);
-  canvas->drawRect(layer_skrect, paint);
 
   gfx::RectF opaque_layer_rect;
   base::TimeTicks begin_record_time;