Enable linking Chrome in the GN build.

chrome/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/features.gni")
 import("//build/config/ui.gni")
 import("//chrome/version.gni")
 
 # TODO(GYP) for Windows need to the the reorder-imports step which probably
 # means adding another target and renaming this to chrome_initial like in GYP.
-#executable("chrome") {  # TODO(GYP) enable once this links.
-source_set("chrome") {
+executable("chrome") {
   # Because the sources list varies so significantly per-platform, generally
   # each platform lists its own files rather than relying on filtering or
   # removing unused files.
   sources = [
     "app/chrome_exe_resource.h",
   ]
   deps = []
 
   # TODO(GYP) mac_bundle_resources, xcode_settings
 
@@ skipping 253 matching lines @@
 
 # GYP version: chrome/chrome_resources.gyp:chrome_strings
 group("strings") {
   deps = [
     "//chrome/app:chromium_strings",
     "//chrome/app:generated_resources",
     "//chrome/app:google_chrome_strings",
     "//chrome/app/resources:locale_settings",
   ]
 }