Use scoped_ptr<> to pass ownership in more places.

remoting/host/disconnect_window_mac.mm

 // Copyright (c) 2011 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.
 
 #import <Cocoa/Cocoa.h>
 
 #import "remoting/host/disconnect_window_mac.h"
 
 #include "base/compiler_specific.h"
 #include "base/string_util.h"
@@ skipping 36 matching lines @@
   [window_controller_ showWindow:nil];
 }
 
 void DisconnectWindowMac::Hide() {
   // DisconnectWindowController is responsible for releasing itself in its
   // windowWillClose: method.
   [window_controller_ close];
   window_controller_ = nil;
 }
 
-remoting::DisconnectWindow* remoting::DisconnectWindow::Create() {
-  return new DisconnectWindowMac;
+scoped_ptr<DisconnectWindow> DisconnectWindow::Create() {
+  return scoped_ptr<DisconnectWindow>(new DisconnectWindowMac());
 }
 
 }  // namespace remoting
 
 @interface DisconnectWindowController()
 @property (nonatomic, assign) remoting::ChromotingHost* host;
 @property (nonatomic, copy) NSString* username;
 
 - (BOOL)isRToL;
 
@@ skipping 216 matching lines @@
   path = [NSBezierPath bezierPath];
   [path moveToPoint:top];
   [path lineToPoint:bottom];
   [light setStroke];
   [path stroke];
 
   [context setShouldAntialias:alias];
 }
 
 @end