Use scoped_ptr<> to pass ownership in more places.

remoting/host/disconnect_window.h

Index: remoting/host/disconnect_window.h
diff --git a/remoting/host/disconnect_window.h b/remoting/host/disconnect_window.h
index d7e6aeed1ee5c6b66b6c002117706a6e93350802..904350a3c7c7ff44156d537e37b9aff5baa3afe0 100644
--- a/remoting/host/disconnect_window.h
+++ b/remoting/host/disconnect_window.h
@@ -7,6 +7,8 @@
 
 #include <string>
 
+#include "base/memory/scoped_ptr.h"
+
 namespace remoting {
 
 class ChromotingHost;
@@ -26,7 +28,7 @@ class DisconnectWindow {
   // Hide the disconnect window.
   virtual void Hide() = 0;
 
-  static DisconnectWindow* Create();
+  static scoped_ptr<DisconnectWindow> Create();
 };
 
 }