Subject .mm files to the header sorting presubmit

extensions/shell/app/paths_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.
 
 #include "extensions/shell/app/paths_mac.h"
 
 #include "base/files/file_path.h"
 #include "base/logging.h"
-#include "base/path_service.h"
 #include "base/mac/bundle_locations.h"
 #include "base/mac/foundation_util.h"
+#include "base/path_service.h"
 #include "content/public/common/content_paths.h"
 
 namespace extensions {
 
 namespace {
 
 base::FilePath GetFrameworksPath() {
   base::FilePath path;
   PathService::Get(base::FILE_EXE, &path);
   // We now have a path .../App Shell.app/Contents/MacOS/App Shell, and want to
@@ skipping 21 matching lines @@
 void OverrideChildProcessFilePath() {
   base::FilePath path = GetFrameworksPath()
                             .Append("App Shell Helper.app")
                             .Append("Contents")
                             .Append("MacOS")
                             .Append("App Shell Helper");
   PathService::Override(content::CHILD_PROCESS_EXE, path);
 }
 
 }  // namespace extensions