Add EmbedRoot to ViewManagerService.

mojo/services/view_manager/view_manager_service_impl.h

Index: mojo/services/view_manager/view_manager_service_impl.h
diff --git a/mojo/services/view_manager/view_manager_service_impl.h b/mojo/services/view_manager/view_manager_service_impl.h
index 00b61cb76eeb4a84795243294b924fbcd7861dd5..a49f729580fbb032457fe8014d0547c7ada754a7 100644
--- a/mojo/services/view_manager/view_manager_service_impl.h
+++ b/mojo/services/view_manager/view_manager_service_impl.h
@@ -205,9 +205,11 @@ class MOJO_VIEW_MANAGER_EXPORT ViewManagerServiceImpl
   virtual void SetNodeVisibility(Id transport_node_id,
                                  bool visible,
                                  const Callback<void(bool)>& callback) OVERRIDE;
-  virtual void Embed(const mojo::String& url,
+  virtual void Embed(const String& url,
                      Id transport_node_id,
-                     const mojo::Callback<void(bool)>& callback) OVERRIDE;
+                     const Callback<void(bool)>& callback) OVERRIDE;
+  virtual void EmbedRoot(const String& url,
+                         const Callback<void(bool)>& callback) OVERRIDE;
   virtual void DispatchOnViewInputEvent(Id transport_view_id,
                                         EventPtr event) OVERRIDE;