Mus+Ash: propagate Surface ID to parents

services/ui/public/cpp/window.h

Index: services/ui/public/cpp/window.h
diff --git a/services/ui/public/cpp/window.h b/services/ui/public/cpp/window.h
index af2aae43276df0a635ac536d80c230c204e35ead..28ea9e2ddc4c5d047dd49550aa438bd38ccf822c 100644
--- a/services/ui/public/cpp/window.h
+++ b/services/ui/public/cpp/window.h
@@ -309,6 +309,10 @@ class Window {
   void LocalSetPredefinedCursor(mojom::Cursor cursor_id);
   void LocalSetSharedProperty(const std::string& name,
                               const std::vector<uint8_t>* data);
+  void LocalSetSurfaceId(const cc::SurfaceId& surface_id,
+                         const cc::SurfaceSequence& surface_sequence,
+                         const gfx::Size& frame_size,
+                         float device_scale_factor);
 
   // Notifies this winodw that its stacking position has changed.
   void NotifyWindowStackingChanged();
@@ -393,6 +397,14 @@ class Window {
 
   std::map<const void*, Value> prop_map_;
 
+  struct SurfaceInfo {
+    cc::SurfaceId surface_id;
+    cc::SurfaceSequence surface_sequence;
+    gfx::Size frame_size;
+    float device_scale_factor;
+  };
+  SurfaceInfo surface_info_;
+
   DISALLOW_COPY_AND_ASSIGN(Window);
 };