Rendering context information added to SharedQuadState

cc/trees/layer_tree_host_impl.cc

Index: cc/trees/layer_tree_host_impl.cc
diff --git a/cc/trees/layer_tree_host_impl.cc b/cc/trees/layer_tree_host_impl.cc
index 309f87404944b3cd4349fef8b7c0495326795034..893e5f90bf20d630df427db523aca39c3e3e7a1d 100644
--- a/cc/trees/layer_tree_host_impl.cc
+++ b/cc/trees/layer_tree_host_impl.cc
@@ -651,7 +651,8 @@ static void AppendQuadsToFillScreen(
                             root_target_rect,
                             false,
                             opacity,
-                            SkXfermode::kSrcOver_Mode);
+                            SkXfermode::kSrcOver_Mode,
+                            root_layer->context_id());

[danakj, 2014/06/13 19:16:03]

I think you want a "not part of a context" id here, these quads are not part of
any layer they're the background behind all the layers.

[troyhildebrandt, 2014/06/13 22:56:36]

Done.

 
   for (Region::Iterator fill_rects(screen_background_color_region);
        fill_rects.has_rect();