Revert 284322 "Allow EmbedRoot to be called multiple times."

trunk/src/mojo/services/public/cpp/view_manager/view_manager.h

Index: trunk/src/mojo/services/public/cpp/view_manager/view_manager.h
===================================================================
--- trunk/src/mojo/services/public/cpp/view_manager/view_manager.h	(revision 284322)
+++ trunk/src/mojo/services/public/cpp/view_manager/view_manager.h	(working copy)
@@ -17,8 +17,8 @@
 
 class Node;
 class View;
+class ViewEventDispatcher;
 class ViewManagerDelegate;
-class WindowManagerDelegate;
 
 class ViewManager {
  public:
@@ -26,13 +26,12 @@
   static void ConfigureIncomingConnection(ApplicationConnection* connection,
                                           ViewManagerDelegate* delegate);
 
-  // Sets the window manager delegate. Can only be called by the app embedded at
-  // the service root node.
-  virtual void SetWindowManagerDelegate(
-      WindowManagerDelegate* window_manager_delegate) = 0;
+  // Sets the event dispatcher. Can only be called by the app rendering to the
+  // root Node of the hierarchy.
+  virtual void SetEventDispatcher(ViewEventDispatcher* dispatcher) = 0;
 
   // Dispatches the supplied event to the specified View. Can be called only
-  // by the application that called SetWindowManagerDelegate().
+  // by the application that called SetEventDispatcher().
   virtual void DispatchEvent(View* target, EventPtr event) = 0;
 
   // Returns the URL of the application that embedded this application.