Add SurfaceManager option to use references exclusively.

services/ui/surfaces/display_compositor.cc

Index: services/ui/surfaces/display_compositor.cc
diff --git a/services/ui/surfaces/display_compositor.cc b/services/ui/surfaces/display_compositor.cc
index 51ce69ef70fd532c6d8c374afea0663f3ac74bf7..12f00e1015135a83d3879f179af76eb2bbe91b26 100644
--- a/services/ui/surfaces/display_compositor.cc
+++ b/services/ui/surfaces/display_compositor.cc
@@ -22,7 +22,8 @@ DisplayCompositor::DisplayCompositor(
     gpu::ImageFactory* image_factory,
     cc::mojom::DisplayCompositorRequest request,
     cc::mojom::DisplayCompositorClientPtr client)
-    : gpu_service_(std::move(gpu_service)),
+    : manager_(true),

[vmpstr, 2016/12/01 21:04:02]

manager_(true /* use_references */)

[kylechar, 2016/12/01 22:49:58]

Changed to enum.

+      gpu_service_(std::move(gpu_service)),
       gpu_memory_buffer_manager_(std::move(gpu_memory_buffer_manager)),
       image_factory_(image_factory),
       client_(std::move(client)),