mac: Update clients of scoped_nsobject.h.

chrome/browser/ui/cocoa/browser_window_controller_browsertest.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/browser_window_controller.h"
 
 #import "base/mac/mac_util.h"
 #include "base/run_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 636 matching lines @@
 }
 
 // Verify that AllowOverlappingViews is set while the history overlay is
 // visible.
 IN_PROC_BROWSER_TEST_F(BrowserWindowControllerTest,
                        AllowOverlappingViewsHistoryOverlay) {
   content::WebContentsView* web_contents_view =
       browser()->tab_strip_model()->GetActiveWebContents()->GetView();
   EXPECT_FALSE(web_contents_view->GetAllowOverlappingViews());
 
-  scoped_nsobject<HistoryOverlayController> overlay(
+  base::scoped_nsobject<HistoryOverlayController> overlay(
       [[HistoryOverlayController alloc] initForMode:kHistoryOverlayModeBack]);
   [overlay showPanelForView:web_contents_view->GetNativeView()];
   EXPECT_TRUE(web_contents_view->GetAllowOverlappingViews());
 
   overlay.reset();
   EXPECT_FALSE(web_contents_view->GetAllowOverlappingViews());
 }