Remove calls to deprecated MessageLoop methods in chrome.

chrome/app_shim/chrome_main_app_mode_mac.mm

 // Copyright 2013 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.
 
 // On Mac, one can't make shortcuts with command-line arguments. Instead, we
 // produce small app bundles which locate the Chromium framework and load it,
 // passing the appropriate data. This is the entry point into the framework for
 // those app bundles.
 
 #import <Cocoa/Cocoa.h>
 #include <vector>
 
 #include "base/at_exit.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/logging.h"
 #include "base/mac/bundle_locations.h"
 #include "base/mac/foundation_util.h"
 #include "base/mac/launch_services_util.h"
 #include "base/mac/mac_logging.h"
 #include "base/mac/mac_util.h"
 #include "base/mac/scoped_nsautorelease_pool.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/mac/sdk_forward_declarations.h"
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
+#include "base/run_loop.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/threading/thread.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/mac/app_mode_common.h"
 #include "chrome/common/mac/app_shim_messages.h"
 #include "chrome/grit/generated_resources.h"
 #include "ipc/ipc_channel_mojo.h"
@@ skipping 667 matching lines @@
   } else {
     // Chrome already running. Proceed to init. This could still fail if Chrome
     // is still starting up or shutting down, but the process will exit quickly,
     // which is preferable to waiting for the Apple Event to timeout after one
     // minute.
     main_message_loop.task_runner()->PostTask(
         FROM_HERE,
         base::Bind(&AppShimController::Init, base::Unretained(&controller)));
   }
 
-  main_message_loop.Run();
+  base::RunLoop().Run();
   return 0;
 }