Enable building headless_shell in MAC. This is an initial implementation with a hidden window, rath…

headless/BUILD.gn

 # Copyright 2015 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("//headless/headless.gni")
 import("//build/util/process_version.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
 import("//testing/test.gni")
 import("//tools/grit/grit_rule.gni")
@@ skipping 271 matching lines @@
     "//components/crash/content/browser",
     "//components/security_state/content",
     "//components/security_state/core",
     "//content/public/app:both",
     "//content/public/browser",
     "//content/public/common",
     "//content/public/common:service_names",
     "//net",
     "//services/service_manager/public/cpp",
     "//third_party/mesa:osmesa",
-    "//ui/aura",
     "//ui/base",
     "//ui/compositor",
     "//ui/display",
     "//ui/events/devices",
     "//url",
   ]
 
   if (is_win) {
     deps += [
       "//build/win:default_exe_manifest",
       "//content:sandbox_helper_win",
       "//sandbox",
     ]
   }
 
+  if (!is_mac) {
+    deps += [ "//ui/aura" ]
+  } else {
+    sources += [ "lib/browser/headless_browser_impl_mac.mm" ]
+  }
+
   if (headless_use_embedded_resources) {
     deps += [ ":embed_resources" ]
     sources += [
       "$root_gen_dir/headless/embedded_resource_pak.cc",
       "$root_gen_dir/headless/embedded_resource_pak.h",
     ]
   } else {
     deps += [ ":pak" ]
   }
 
@@ skipping 149 matching lines @@
 
 executable("headless_example") {
   sources = [
     "app/headless_example.cc",
   ]
 
   deps = [
     "//headless:headless_shell_lib",
   ]
 }