mac: Remove unused includes of scoped_nsobject.h.

chrome/browser/ui/cocoa/draggable_button_mixin.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 "chrome/browser/ui/cocoa/draggable_button.h"
 
 #include <cmath>
 
 #include "base/logging.h"
-#import "base/mac/scoped_nsobject.h"
-
-namespace {
 
 // Code taken from <http://codereview.chromium.org/180036/diff/3001/3004>.
 // TODO(viettrungluu): Do we want common, standard code for drag hysteresis?
 const CGFloat kWebDragStartHysteresisX = 5.0;
 const CGFloat kWebDragStartHysteresisY = 5.0;
 const CGFloat kDragExpirationTimeout = 0.45;
 
-}
-
 // Private /////////////////////////////////////////////////////////////////////
 
 @interface DraggableButtonImpl (Private)
 
 - (BOOL)deltaIndicatesDragStartWithXDelta:(float)xDelta
                                    yDelta:(float)yDelta
                               xHysteresis:(float)xHysteresis
                               yHysteresis:(float)yHysteresis;
 - (BOOL)deltaIndicatesConclusionReachedWithXDelta:(float)xDelta
                                            yDelta:(float)yDelta
@@ skipping 248 matching lines @@
 
 - (void)endDrag {
   if ([button_ respondsToSelector:_cmd] &&
       [button_ endDrag] != kDraggableButtonImplUseBase) {
     return;
   }
   [button_ highlight:NO];
 }
 
 @end