mac: Remove OwnershipPolicy parameter to scoped_nsobject.

chrome/browser/ui/cocoa/panels/panel_window_controller_cocoa.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.
 
 #include "chrome/browser/ui/cocoa/panels/panel_window_controller_cocoa.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/auto_reset.h"
 #include "base/logging.h"
@@ skipping 217 matching lines @@
   // If the panel is not resizable, hitTest should have failed and no mouse
   // events should have come here.
   DCHECK_NE(panel::NOT_RESIZABLE, panel_->CanResizeByMouse());
 
   // Make sure the cursor stays the same during whole resize operation.
   // The cursor rects normally do not guarantee the same cursor, since the
   // mouse may temporarily leave the cursor rect area (or even the window) so
   // the cursor will flicker. Disable cursor rects and grab the current cursor
   // so we can set it on mouseDragged: events to avoid flicker.
   [[self window] disableCursorRects];
-  dragCursor_.reset([NSCursor currentCursor], base::scoped_policy::RETAIN);
+  dragCursor_.reset([[NSCursor currentCursor] retain]);
 }
 
 - (void)cleanupAfterDrag {
   [[self window] enableCursorRects];
   dragCursor_.reset();
 }
 
 - (void)dragStarted:(NSPoint)initialMouseLocation {
   NSPoint initialMouseLocationScreen =
       [[self window] convertBaseToScreen:initialMouseLocation];
@@ skipping 673 matching lines @@
 - (NSRect)contentRectForFrameRect:(NSRect)frameRect {
   NSRect contentRect = [[[self window] contentView] convertRect:frameRect
                                                        fromView:nil];
   contentRect.size.height -= panel::kTitlebarHeight;
   if (contentRect.size.height < 0)
     contentRect.size.height = 0;
   return contentRect;
 }
 
 @end