cc: Move ownership of surfaces to SurfaceManager

cc/surfaces/surface.cc

Index: cc/surfaces/surface.cc
diff --git a/cc/surfaces/surface.cc b/cc/surfaces/surface.cc
index 9be53ad344321bf0cdda2f32a160713ca125df23..164f8b59d3b52c4fab5ac8fd91cc00f02296d14e 100644
--- a/cc/surfaces/surface.cc
+++ b/cc/surfaces/surface.cc
@@ -30,7 +30,8 @@ Surface::Surface(
       compositor_frame_sink_support_(std::move(compositor_frame_sink_support)),
       surface_manager_(compositor_frame_sink_support_->surface_manager()),
       frame_index_(kFrameIndexStart),
-      destroyed_(false) {}
+      destroyed_(false),
+      weak_factory_(this) {}
 
 Surface::~Surface() {
   ClearCopyRequests();
@@ -376,4 +377,8 @@ void Surface::TakeLatencyInfoFromFrame(
   frame->metadata.latency_info.clear();
 }
 
+base::WeakPtr<Surface> Surface::AsWeakPtr() {
+  return weak_factory_.GetWeakPtr();
+}
+
 }  // namespace cc