mac: Update clients of scoped_nsobject.h.

ui/base/cocoa/tracking_area.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 "ui/base/cocoa/tracking_area.h"
 
 #include "base/logging.h"
 
 // NSTrackingArea does not retain its |owner| so CrTrackingArea wraps the real
 // owner in this proxy, which can stop forwarding messages to the owner when
@@ skipping 53 matching lines @@
 @end
 
 ////////////////////////////////////////////////////////////////////////////////
 
 @implementation CrTrackingArea
 
 - (id)initWithRect:(NSRect)rect
                         options:(NSTrackingAreaOptions)options
                           owner:(id)owner
                        userInfo:(NSDictionary*)userInfo {
-  scoped_nsobject<CrTrackingAreaOwnerProxy> ownerProxy(
+  base::scoped_nsobject<CrTrackingAreaOwnerProxy> ownerProxy(
       [[CrTrackingAreaOwnerProxy alloc] initWithOwner:owner]);
   if ((self = [super initWithRect:rect
                           options:options
                             owner:ownerProxy.get()
                          userInfo:userInfo])) {
     ownerProxy_.swap(ownerProxy);
   }
   return self;
 }
 
@@ skipping 36 matching lines @@
 
 void ScopedCrTrackingArea::reset(CrTrackingArea* tracking_area) {
   tracking_area_.reset(tracking_area);
 }
 
 CrTrackingArea* ScopedCrTrackingArea::get() const {
   return tracking_area_.get();
 }
 
 }  // namespace ui