cc: Pass SurfaceId by const ref in more places

cc/surfaces/surface.h

Index: cc/surfaces/surface.h
diff --git a/cc/surfaces/surface.h b/cc/surfaces/surface.h
index e91d0bf6ad418fca3371484788ae52fde2687e00..d101f6dffed7b560069567cc26f9a44659b834d1 100644
--- a/cc/surfaces/surface.h
+++ b/cc/surfaces/surface.h
@@ -40,11 +40,11 @@ class CC_SURFACES_EXPORT Surface {
  public:
   using DrawCallback = SurfaceFactory::DrawCallback;
 
-  Surface(SurfaceId id, SurfaceFactory* factory);
+  Surface(const SurfaceId& id, SurfaceFactory* factory);
   ~Surface();
 
-  SurfaceId surface_id() const { return surface_id_; }
-  SurfaceId previous_frame_surface_id() const {
+  const SurfaceId& surface_id() const { return surface_id_; }
+  const SurfaceId& previous_frame_surface_id() const {
     return previous_frame_surface_id_;
   }