Subject .mm files to the header sorting presubmit

chrome/browser/ui/cocoa/download/download_shelf_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 "chrome/browser/ui/cocoa/download/download_shelf_mac.h"
 
 #include "chrome/browser/download/download_item_model.h"
 #include "chrome/browser/ui/browser.h"
+#include "chrome/browser/ui/cocoa/download/download_item_mac.h"
 #import "chrome/browser/ui/cocoa/download/download_shelf_controller.h"
-#include "chrome/browser/ui/cocoa/download/download_item_mac.h"
 
 DownloadShelfMac::DownloadShelfMac(Browser* browser,
                                    DownloadShelfController* controller)
     : browser_(browser),
       shelf_controller_(controller) {
 }
 
 void DownloadShelfMac::DoAddDownload(content::DownloadItem* download) {
   [shelf_controller_ addDownloadItem:download];
 }
@@ skipping 15 matching lines @@
 
 void DownloadShelfMac::DoClose(CloseReason reason) {
   [shelf_controller_ showDownloadShelf:NO
                           isUserAction:reason == USER_ACTION];
   browser_->UpdateDownloadShelfVisibility(false);
 }
 
 Browser* DownloadShelfMac::browser() const {
   return browser_;
 }