Start of hardware overlay support in CC with Ubercompositor.

cc/surfaces/surface_aggregator.cc

Index: cc/surfaces/surface_aggregator.cc
diff --git a/cc/surfaces/surface_aggregator.cc b/cc/surfaces/surface_aggregator.cc
index 5b108bb2304e25d6b59c74313aaa4216ed366c5d..4d06101759b7e60b333c4cedb0eefb9a97a05e42 100644
--- a/cc/surfaces/surface_aggregator.cc
+++ b/cc/surfaces/surface_aggregator.cc
@@ -97,7 +97,8 @@ void SurfaceAggregator::HandleSurfaceQuad(const SurfaceDrawQuad* surface_quad,
                       source.output_rect,
                       source.damage_rect,
                       source.transform_to_root_target,
-                      source.has_transparent_background);
+                      source.has_transparent_background,
+                      source.overlay_state);
 
     // Contributing passes aggregated in to the pass list need to take the
     // transform of the surface quad into account to update their transform to
@@ -203,7 +204,8 @@ void SurfaceAggregator::CopyPasses(const RenderPassList& source_pass_list,
                       source.output_rect,
                       source.damage_rect,
                       source.transform_to_root_target,
-                      source.has_transparent_background);
+                      source.has_transparent_background,
+                      source.overlay_state);
 
     CopyQuadsToPass(source.quad_list,
                     source.shared_quad_state_list,