Subject .mm files to the header sorting presubmit

content/shell/renderer/test_runner/helper/layout_test_helper_mac.mm

 // Copyright 2014 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.
 
 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2012 Apple Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
@@ skipping 15 matching lines @@
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+#import <AppKit/AppKit.h>
 #import <AvailabilityMacros.h>
-#import <AppKit/AppKit.h>
 #include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 
 // This is a simple helper app that changes the color sync profile to the
 // generic profile and back when done.  This program is managed by the layout
 // test script, so it can do the job for multiple DumpRenderTree while they are
 // running layout tests.
 
 namespace {
@@ skipping 206 matching lines @@
 
   // Wait for any key (or signal).
   getchar();
 
   // Restore the profile.
   RestoreUserColorProfile();
 
   [pool release];
   return 0;
 }