Display skips swapping if overlays draw the damage

cc/output/output_surface.h

Index: cc/output/output_surface.h
diff --git a/cc/output/output_surface.h b/cc/output/output_surface.h
index 2176455266b98164d2f9ae0740e90af942a2721e..4985f9538b3c5a0c0f6682c3b53c566284602928 100644
--- a/cc/output/output_surface.h
+++ b/cc/output/output_surface.h
@@ -68,7 +68,8 @@ class CC_EXPORT OutputSurface : public base::trace_event::MemoryDumpProvider {
           uses_default_gl_framebuffer(true),
           flipped_output_surface(false),
           can_force_reclaim_resources(false),
-          delegated_sync_points_required(true) {}
+          delegated_sync_points_required(true),
+          schedules_overlays_without_swap(false) {}
     bool delegated_rendering;
     int max_frames_pending;
     // This doesn't handle the <webview> case, but once BeginFrame is
@@ -85,6 +86,9 @@ class CC_EXPORT OutputSurface : public base::trace_event::MemoryDumpProvider {
     // True if sync points for resources are needed when swapping delegated
     // frames.
     bool delegated_sync_points_required;
+    // Whether the surface will display overlay planes as soon as they're
+    // scheduled rather than on the next swap.
+    bool schedules_overlays_without_swap;
   };
 
   const Capabilities& capabilities() const {