Mac: Give app_shim code a nicer home

apps/app_shim/app_shim.gypi

Index: apps/app_shim/app_shim.gypi
diff --git a/apps/app_shim/app_shim.gypi b/apps/app_shim/app_shim.gypi
deleted file mode 100644
index 51a729a869d0e7cb4a942303c8e7e3f8a014629d..0000000000000000000000000000000000000000
--- a/apps/app_shim/app_shim.gypi
+++ /dev/null
@@ -1,36 +0,0 @@
-# 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.
-
-{
-  'targets': [
-    {
-      'target_name': 'app_shim',
-      'type': 'static_library',
-      # Since app_shim and browser depend on each other, we omit the dependency
-      # on browser here.
-      'dependencies': [
-        '../chrome/chrome_resources.gyp:chrome_strings',
-        '../content/content.gyp:content_common',
-        '../skia/skia.gyp:skia',
-      ],
-      'include_dirs': [
-        '<(INTERMEDIATE_DIR)',
-        '<(grit_out_dir)',
-      ],
-      'sources': [
-        'app_shim_handler_mac.cc',
-        'app_shim_handler_mac.h',
-        'app_shim_host_mac.cc',
-        'app_shim_host_mac.h',
-        'app_shim_host_manager_mac.h',
-        'app_shim_host_manager_mac.mm',
-        'chrome_main_app_mode_mac.mm',
-        'extension_app_shim_handler_mac.cc',
-        'extension_app_shim_handler_mac.h',
-        'unix_domain_socket_acceptor.cc',
-        'unix_domain_socket_acceptor.h',
-      ],
-    },
-  ],  # targets
-}