chrome: Use base::MessageLoop. (Part 2)

chrome/browser/ui/cocoa/extensions/extension_install_dialog_controller.mm

 // Copyright (c) 2012 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 "chrome/browser/ui/cocoa/extensions/extension_install_dialog_controller.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "chrome/browser/ui/browser.h"
@@ skipping 54 matching lines @@
 void ExtensionInstallDialogController::InstallUIAbort(bool user_initiated) {
   delegate_->InstallUIAbort(user_initiated);
   delegate_ = NULL;
   constrained_window_->CloseWebContentsModalDialog();
 }
 
 void ExtensionInstallDialogController::OnConstrainedWindowClosed(
     ConstrainedWindowMac* window) {
   if (delegate_)
     delegate_->InstallUIAbort(false);
-  MessageLoop::current()->DeleteSoon(FROM_HERE, this);
+  base::MessageLoop::current()->DeleteSoon(FROM_HERE, this);
 }
 
 // static
 ExtensionInstallPrompt::ShowDialogCallback
 ExtensionInstallPrompt::GetDefaultShowDialogCallback() {
   return base::Bind(&ShowExtensionInstallDialogImpl);
 }