Aura-Mus: Allocate a LocalSurfaceId on size change

ui/aura/mus/window_mus.h

Index: ui/aura/mus/window_mus.h
diff --git a/ui/aura/mus/window_mus.h b/ui/aura/mus/window_mus.h
index 873ac31c1a53d73c252690fb65d71644a7623793..65f0ae744807c2d1d6ff55165962866cd41522a0 100644
--- a/ui/aura/mus/window_mus.h
+++ b/ui/aura/mus/window_mus.h
@@ -84,6 +84,9 @@ class AURA_EXPORT WindowMus {
                                      const std::vector<uint8_t>* data) = 0;
   virtual void SetFrameSinkIdFromServer(
       const cc::FrameSinkId& frame_sink_id) = 0;
+  virtual const cc::LocalSurfaceId& GetLocalSurfaceId() = 0;

[sky, 2017/03/29 00:07:35]

Move this beneath all the other SetFooFromServer functions.

[Fady Samuel, 2017/03/29 22:10:14]

Done.

+  virtual const cc::LocalSurfaceId& GetOrAllocateLocalSurfaceId(
+      const gfx::Size& new_size) = 0;
   virtual void SetSurfaceInfoFromServer(
       const cc::SurfaceInfo& surface_info) = 0;
   // The window was deleted on the server side. DestroyFromServer() should