mac: Update clients of scoped_nsobject.h.

chrome/browser/ui/cocoa/toolbar/wrench_toolbar_button_cell_unittest.mm

 // Copyright (c) 2013 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/toolbar/wrench_toolbar_button_cell.h"
 
 #include "base/message_loop.h"
 #import "chrome/browser/ui/cocoa/cocoa_test_helper.h"
 
 @interface TestWrenchToolbarButton : NSButton
 @end
 
 @implementation TestWrenchToolbarButton
 
 + (Class)cellClass {
   return [WrenchToolbarButtonCell class];
 }
 
 @end
 
 class WrenchToolbarButtonCellTest : public CocoaTest {
  protected:
   WrenchToolbarButtonCellTest() {
-    scoped_nsobject<NSButton> button([[TestWrenchToolbarButton alloc]
+    base::scoped_nsobject<NSButton> button([[TestWrenchToolbarButton alloc]
         initWithFrame:NSMakeRect(0, 0, 29, 29)]);
     button_ = button;
     [[test_window() contentView] addSubview:button_];
   }
 
   NSButton* button_;
-  scoped_nsobject<WrenchToolbarButtonCell> cell_;
+  base::scoped_nsobject<WrenchToolbarButtonCell> cell_;
   base::MessageLoopForUI message_loop_;  // Needed for ui::Animation.
 
  private:
   DISALLOW_COPY_AND_ASSIGN(WrenchToolbarButtonCellTest);
 };
 
 TEST_VIEW(WrenchToolbarButtonCellTest, button_)