Pass ServiceProvider thru ViewManagerService::Embed() allowing embedder & embeddee to expose servic…

mojo/examples/wm_flow/app/embedder.mojom

Index: mojo/examples/wm_flow/app/embedder.mojom
diff --git a/mojo/services/public/interfaces/surfaces/surface_id.mojom b/mojo/examples/wm_flow/app/embedder.mojom
similarity index 73%
copy from mojo/services/public/interfaces/surfaces/surface_id.mojom
copy to mojo/examples/wm_flow/app/embedder.mojom
index 5a7686da33112b7d5d64204c42d5f6da6efadc39..aae787052f7ace9ee64d330dcaf565b5c9822dcf 100644
--- a/mojo/services/public/interfaces/surfaces/surface_id.mojom
+++ b/mojo/examples/wm_flow/app/embedder.mojom
@@ -2,10 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-module mojo {
+module examples {
 
-struct SurfaceId {
-  uint64 id;
+interface Embedder {
+  HelloWorld() => ();
 };
 
 }