Adds more to viewmanager

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.
 
 module mojo.services.view_manager {
 
 // Functions that mutate the hierarchy take a |change_id|. |change_id| is an
 // arbitrary value assigned by the client originating the change. It may be
 // used by the client originating the change to later identify the change in
 // an OnNodeHierarchyChanged callback. |change_id| is only passed to the client
 // that originated the change; all other clients get a value of 0.
 //
 // Nodes are identified by a uint32. The upper 16 bits are the connection id,
 // and the lower 16 the id assigned by the client. CreateNode() only takes a
 // uint16 as the connection id of the originating connection is used.
 //
 // The root node is identified with a connection id of 0, and value of 1.
 [Peer=ViewManagerClient]
 interface ViewManager {
   // Creates a new node 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).
   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);
 
   // Removes a view from its current parent.  See description above class for
   // details of |change_id|.
   RemoveNodeFromParent(uint32 node_id, int32 change_id) => (bool success);
 
   // 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]
 interface ViewManagerClient {
   // Invoked once the connection has been established. |connection_id| is the id
   // used to uniquely identify the connection.
   OnConnectionEstablished(uint16 connection_id);
 
   // Invoked when a change is done to the hierarchy. A value of 0 is used to
   // identify a null node. For example, if the old_parent is NULL, 0 is
   // supplied. See description above ViewManager for details on |change_id|.
   OnNodeHierarchyChanged(uint32 node,
                          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);
 };
 
 }