Don't build the main executable binaries as Objective-C

chrome/app/chrome_exe_main_mac.mm

Index: chrome/app/chrome_exe_main_mac.mm
===================================================================
--- chrome/app/chrome_exe_main_mac.mm	(revision 98054)
+++ chrome/app/chrome_exe_main_mac.mm	(working copy)
@@ -1,21 +0,0 @@
-// Copyright (c) 2010 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.
-
-// The entry point for all Mac Chromium processes, including the outer app
-// bundle (browser) and helper app (renderer, plugin, and friends).
-
-#include <stdlib.h>
-
-extern "C" {
-int ChromeMain(int argc, char** argv);
-}
-
-__attribute__((visibility("default")))
-int main(int argc, char* argv[]) {
-  int rv = ChromeMain(argc, argv);
-
-  // exit, don't return from main, to avoid the apparent removal of main from
-  // stack backtraces under tail call optimization.
-  exit(rv);
-}