Adds more to viewmanager

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

Index: mojo/services/public/interfaces/view_manager/view_manager.mojom
diff --git a/mojo/services/public/interfaces/view_manager/view_manager.mojom b/mojo/services/public/interfaces/view_manager/view_manager.mojom
index ef5dcf3c34aa4d721dd087cdec1d0a5ef7b1c37a..673068cc1a457b773f9052868cdcf7db634aac6b 100644
--- a/mojo/services/public/interfaces/view_manager/view_manager.mojom
+++ b/mojo/services/public/interfaces/view_manager/view_manager.mojom
@@ -21,6 +21,10 @@ interface ViewManager {
   // the id is unique to the connection (the id need not be globally unique).
   CreateNode(uint16 node_id) => (bool success);
 
+  // Deletes a node. This does not recurse. Children are removed from the node
+  // before it is destroyed.
+  DeleteNode(uint32 node_id, int32 change_id) => (bool success);
+
   // Reparents a node. See description above class for details of |change_id|.
   AddNode(uint32 parent, uint32 child, int32 change_id) => (bool success);
 
@@ -30,10 +34,13 @@ interface ViewManager {
 
   // Creates a new view with the specified id. It is up to the client to ensure
   // the id is unique to the connection (the id need not be globally unique).
-  // CreateView(uint16 view_id) => (bool success);
+  CreateView(uint16 view_id) => (bool success);
+
+  // Deletes the view with the specified id.
+  DeleteView(uint32 view_id, int32 change_id) => (bool success);
 
   // Sets the view a node is showing.
-  // SetView(uint32 node, uint32 view) => (bool success);
+  SetView(uint32 node_id, uint32 view_id, int32 change_id) => (bool success);
 };
 
 [Peer=ViewManager]
@@ -49,6 +56,13 @@ interface ViewManagerClient {
                          uint32 new_parent,
                          uint32 old_parent,
                          int32 change_id);
+
+  // Invoked when the view associated with a node is replaced by another view.
+  // 0 is used to identify a null view.
+  OnNodeViewReplaced(uint32 node,
+                     uint32 new_view_id,
+                     uint32 old_view_id,
+                     int32 change_id);
 };
 
 }