mac: Remove now-unneeded includes of cocoa_protocols.h

ui/base/dialogs/select_file_dialog_mac.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 "ui/base/dialogs/select_file_dialog.h"
 
 #import <Cocoa/Cocoa.h>
 #include <CoreServices/CoreServices.h>
 
 #include <map>
 #include <set>
 #include <vector>
 
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/mac/bundle_locations.h"
-#import "base/mac/cocoa_protocols.h"
 #include "base/mac/foundation_util.h"
 #include "base/mac/mac_util.h"
 #include "base/mac/scoped_cftyperef.h"
 #import "base/memory/scoped_nsobject.h"
 #include "base/sys_string_conversions.h"
 #include "base/threading/thread_restrictions.h"
 #include "grit/ui_strings.h"
 #import "ui/base/cocoa/nib_loading.h"
 #include "ui/base/l10n/l10n_util_mac.h"
 
@@ skipping 405 matching lines @@
 
 namespace ui {
 
 SelectFileDialog* CreateMacSelectFileDialog(
     SelectFileDialog::Listener* listener,
     SelectFilePolicy* policy) {
   return new SelectFileDialogImpl(listener, policy);
 }
 
 }  // namespace ui