Adds more to viewmanager

mojo/services/view_manager/root_node_manager.h

 // 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.
 
 #ifndef MOJO_SERVICES_VIEW_MANAGER_ROOT_NODE_MANAGER_H_
 #define MOJO_SERVICES_VIEW_MANAGER_ROOT_NODE_MANAGER_H_
 
 #include <map>
 
 #include "base/basictypes.h"
@@ skipping 32 matching lines @@
 
   RootNodeManager();
   virtual ~RootNodeManager();
 
   // Returns the id for the next ViewManagerConnection.
   uint16_t GetAndAdvanceNextConnectionId();
 
   void AddConnection(ViewManagerConnection* connection);
   void RemoveConnection(ViewManagerConnection* connection);
 
+  // Returns the connection by id.
+  ViewManagerConnection* GetConnection(uint16_t connection_id);
+
   // Returns the Node identified by |id|.
   Node* GetNode(const NodeId& id);
 
-  // Notifies all ViewManagerConnections of a hierarchy change.
+  // Returns the View identified by |id|.
+  View* GetView(const ViewId& id);
+
+  // These functions trivially delegate to all ViewManagerConnections, which in
+  // term notify their clients.
   void NotifyNodeHierarchyChanged(const NodeId& node,
                                   const NodeId& new_parent,
                                   const NodeId& old_parent);
+  void NotifyNodeViewChanged(const NodeId& node,
+                             const ViewId& new_view_id,
+                             const ViewId& old_view_id);
 
  private:
   // Tracks a change.
   struct Change {
     Change(int32_t connection_id, int32_t change_id)
         : connection_id(connection_id),
           change_id(change_id) {
     }
 
     int32_t connection_id;
@@ skipping 17 matching lines @@
   virtual void OnCreated() OVERRIDE;
   virtual void OnDestroyed() OVERRIDE;
   virtual void OnBoundsChanged(const Rect& bounds) OVERRIDE;
   virtual void OnEvent(const Event& event,
                        const mojo::Callback<void()>& callback) OVERRIDE;
 
   // Overriden from NodeDelegate:
   virtual void OnNodeHierarchyChanged(const NodeId& node,
                                       const NodeId& new_parent,
                                       const NodeId& old_parent) OVERRIDE;
+  virtual void OnNodeViewChanged(const NodeId& node,
+                                 const ViewId& new_view_id,
+                                 const ViewId& old_view_id) OVERRIDE;
 
   // ID to use for next ViewManagerConnection.
   uint16_t next_connection_id_;
 
   // Set of ViewManagerConnections.
   ConnectionMap connection_map_;
 
   // Root node.
   Node root_;
 
   // If non-null we're processing a change.
   scoped_ptr<Change> change_;
 
   DISALLOW_COPY_AND_ASSIGN(RootNodeManager);
 };
 
 }  // namespace view_manager
 }  // namespace services
 }  // namespace mojo
 
 #endif  // MOJO_SERVICES_VIEW_MANAGER_ROOT_NODE_MANAGER_H_