Use local ids for Surfaces APIs that can only apply to local surfaces

examples/surfaces_app/embedder.h

Index: examples/surfaces_app/embedder.h
diff --git a/examples/surfaces_app/embedder.h b/examples/surfaces_app/embedder.h
index f7c08ff7dabd60e4693f50c0cf4221282485b2ea..b8c70c4c5635040940ebcea2322d2d1b9cc2f00d 100644
--- a/examples/surfaces_app/embedder.h
+++ b/examples/surfaces_app/embedder.h
@@ -23,12 +23,9 @@ namespace examples {
 // Simple example of a surface embedder that embeds two other surfaces.
 class Embedder {
  public:
-  Embedder();
+  Embedder(uint32_t local_id, Surface* surface);
   ~Embedder();
 
-  void set_surface(Surface* surface) { surface_ = surface; }
-  void set_surface_id(SurfaceIdPtr id) { id_ = id.Clone(); }
-
   void ProduceFrame(cc::SurfaceId child_one,
                     cc::SurfaceId child_two,
                     const gfx::Size& child_size,
@@ -36,7 +33,7 @@ class Embedder {
                     int offset);
 
  private:
-  SurfaceIdPtr id_;
+  uint32_t local_id_;
   Surface* surface_;
 
   DISALLOW_COPY_AND_ASSIGN(Embedder);