Make unit_tests compile in Mac GN

chrome/browser/BUILD.gn

 # 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.
 
 import("//build/config/chrome_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//third_party/protobuf/proto_library.gni")
 
@@ skipping 365 matching lines @@
   if (!is_android && !is_ios && enable_configuration_policy) {
     sources += [
       "download/download_dir_policy_handler.cc",
       "download/download_dir_policy_handler.h",
     ]
   }
   if (is_mac) {
     sources +=
         rebase_path(gypi_values.chrome_browser_mac_sources, ".", "//chrome")
     deps += [
-      #"app_shim"  TODO(GYP) bug 512600
-      #"browser_app_shim"  TODO(GYP) bug 512600
+      "//chrome/app_shim",
+      "//chrome/browser/apps/app_shim",
     ]
   }
   if (is_mac || is_android) {
     sources += rebase_path(
             gypi_values.chrome_browser_password_manager_mac_android_sources,
             ".",
             "//chrome")
   }
   if (enable_extensions) {
     public_deps += [ "//chrome/browser/extensions" ]
@@ skipping 855 matching lines @@
         rebase_path(gypi_values.chrome_browser_rlz_sources, ".", "//chrome")
     deps = [
       "//components/google/core/browser",
       "//components/omnibox/browser",
       "//components/rlz",
       "//components/search_engines",
       "//rlz:rlz_lib",
     ]
   }
 }