Add EmbedRoot to ViewManagerService.

mojo/services/public/interfaces/view_manager/view_manager.mojom

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 import "mojo/services/public/interfaces/geometry/geometry.mojom"
 import "mojo/services/public/interfaces/input_events/input_events.mojom"
 import "mojo/services/public/interfaces/view_manager/view_manager_constants.mojom"
 
 module mojo.view_manager {
 
@@ skipping 119 matching lines @@
   // notified of the additional roots by way of OnRootAdded().
   //
   // A node may only be a root of one connection at a time. Subsequent calls to
   // Embed() for the same node result in the node being removed from the
   // current connection. The current connection is told this by way of
   // OnNodeDeleted().
   //
   // This advances the server change id.
   Embed(string url, uint32 node_id) => (bool success);
 
+  // Requests the view manager embed the app for |url| "somewhere". The View
+  // Manager delegates determination of what "somewhere" is to the app embedded
+  // at the service root node (i.e. the window manager).
+  EmbedRoot(string url) => (bool success);

[sky, 2014/07/21 19:26:53]

Using 'root' here implies this gets the root, which is a bit confusing.

+
   // TODO(sky): move these to a separate interface when FIFO works.
 
   // Sends OnViewInputEvent() to the owner of the specified view.
   DispatchOnViewInputEvent(uint32 view_id, mojo.Event event);
 };
 
 // Changes to nodes/views are not sent to the connection that originated the
 // change. For example, if connection 1 attaches a view to a node (SetView())
 // connection 1 does not receive OnNodeViewReplaced().
 [Client=ViewManagerService]
@@ skipping 57 matching lines @@
   //            once support for derived FIFOs is landed.
 
   // Requests the window manager create a "top level" node embedding |url|.
   EmbedRoot(string url);
 
   // Requests the view manager dispatch the event targeted at |view|.
   DispatchOnViewInputEvent(uint32 view, mojo.Event event);
 };
 
 }