Remove OpenWindow from the WindowManager interface.

mojo/services/window_manager/window_manager_app.h

Index: mojo/services/window_manager/window_manager_app.h
diff --git a/mojo/services/window_manager/window_manager_app.h b/mojo/services/window_manager/window_manager_app.h
index 098f5cb03e7cdb33822706952ae6f8354b4c3077..a8f9f808712369c75b78076639d16977ec2eded0 100644
--- a/mojo/services/window_manager/window_manager_app.h
+++ b/mojo/services/window_manager/window_manager_app.h
@@ -15,7 +15,7 @@
 #include "mojo/services/public/cpp/view_manager/types.h"
 #include "mojo/services/public/cpp/view_manager/view_manager_client_factory.h"
 #include "mojo/services/public/cpp/view_manager/view_manager_delegate.h"
-#include "mojo/services/public/cpp/view_manager/view_observer.h"
+#include "mojo/services/public/cpp/view_manager/view_observer.h"
 #include "mojo/services/window_manager/window_manager_service_impl.h"
 #include "ui/aura/client/focus_change_observer.h"
 #include "ui/wm/public/activation_change_observer.h"
@@ -52,8 +52,6 @@ class WindowManagerApp
   void AddConnection(WindowManagerServiceImpl* connection);
   void RemoveConnection(WindowManagerServiceImpl* connection);
 
-  Id OpenWindow();
-  Id OpenWindowWithURL(const String& url);
   void SetCapture(Id view);
   void FocusWindow(Id view);
   void ActivateWindow(Id view);