Get headless_shell building on Windows.

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 281 matching lines @@
     "//net",
     "//services/service_manager/public/cpp",
     "//third_party/mesa:osmesa",
     "//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" ]
   }
 
   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",
     ]
@@ skipping 132 matching lines @@
 
 executable("headless_shell") {
   sources = [
     "app/headless_shell_main.cc",
   ]
 
   deps = [
     "//headless:headless_shell_lib",
   ]
 
+  if (is_win) {
+    deps += [
+      "//build/win:default_exe_manifest",
+      "//content:sandbox_helper_win",
+      "//sandbox",
+    ]
+  }
+
   configs += [ ":headless_implementation" ]
 }
 
 process_version("version_header") {
   template_file = "public/version.h.in"
   sources = [
     "//build/util/LASTCHANGE",
     "//chrome/VERSION",
   ]
   output = "$target_gen_dir/public/version.h"
 }
 
 executable("headless_example") {
   sources = [
     "app/headless_example.cc",
   ]
 
   deps = [
     "//headless:headless_shell_lib",
   ]
 }