Add flag for drawing layers to screen with Ganesh

cc/quads/picture_draw_quad.h

Index: cc/quads/picture_draw_quad.h
diff --git a/cc/quads/picture_draw_quad.h b/cc/quads/picture_draw_quad.h
index 40e8487ba38d1fee543000e2ce87329c4b8f47de..29af6d5c6dcbdb21b54019e12bf1f2f8113d638a 100644
--- a/cc/quads/picture_draw_quad.h
+++ b/cc/quads/picture_draw_quad.h
@@ -30,6 +30,7 @@ class CC_EXPORT PictureDrawQuad : public ContentDrawQuadBase {
               bool swizzle_contents,
               gfx::Rect content_rect,
               float contents_scale,
+              bool can_draw_direct_to_backbuffer,
               scoped_refptr<PicturePileImpl> picture_pile);
 
   void SetAll(const SharedQuadState* shared_quad_state,
@@ -42,10 +43,12 @@ class CC_EXPORT PictureDrawQuad : public ContentDrawQuadBase {
               bool swizzle_contents,
               gfx::Rect content_rect,
               float contents_scale,
+              bool can_draw_direct_to_backbuffer,
               scoped_refptr<PicturePileImpl> picture_pile);
 
   gfx::Rect content_rect;
   float contents_scale;
+  bool can_draw_direct_to_backbuffer;
   scoped_refptr<PicturePileImpl> picture_pile;
 
   virtual void IterateResources(const ResourceIteratorCallback& callback)