Mus+Ash: propagate Surface ID to parents

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 1bc067e798a7e860bbf75d53d8680194eef85798..5847814353dbaa96ce04fef3c85c3374f584409b 100644
--- a/services/ui/surfaces/display_compositor.cc
+++ b/services/ui/surfaces/display_compositor.cc
@@ -4,14 +4,38 @@
 
 #include "services/ui/surfaces/display_compositor.h"
 
-namespace ui {
+#include "services/ui/surfaces/display_compositor_client.h"
 
-DisplayCompositor::DisplayCompositor() : next_client_id_(1u) {}
+namespace ui {
 
-DisplayCompositor::~DisplayCompositor() {}
+DisplayCompositor::DisplayCompositor(DisplayCompositorClient* client)
+    : client_(client), next_client_id_(1u) {
+  manager_.AddObserver(this);
+}
 
 uint32_t DisplayCompositor::GenerateNextClientId() {
   return next_client_id_++;
 }
 
+void DisplayCompositor::ReturnSurfaceReference(
+    const cc::SurfaceSequence& sequence) {
+  std::vector<uint32_t> sequences;
+  sequences.push_back(sequence.sequence);
+  manager_.DidSatisfySequences(sequence.frame_sink_id, &sequences);
+}
+
+DisplayCompositor::~DisplayCompositor() {
+  manager_.RemoveObserver(this);
+}
+
+void DisplayCompositor::OnSurfaceCreated(const cc::SurfaceId& surface_id,
+                                         const gfx::Size& frame_size,
+                                         float device_scale_factor) {
+  if (client_)
+    client_->OnSurfaceCreated(surface_id, frame_size, device_scale_factor);
+}
+
+void DisplayCompositor::OnSurfaceDamaged(const cc::SurfaceId& surface_id,
+                                         bool* changed) {}
+
 }  // namespace ui