GN: Specify grit generated output paths to be the same as gyp's.

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/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//components/nacl/nacl_defines.gni")
 import("//tools/grit/grit_rule.gni")
 
@@ skipping 595 matching lines @@
           gypi_values.chrome_browser_win_mac_wifi_bootstrapping_sources,
           ".", "//chrome")
     }
   }
 }
 
 # GYP version: chrome/chrome_resources.gyp:chrome_resources
 # (generate_browser_resources action)
 grit("resources") {
   source = "browser_resources.grd"
+  output_dir = "$root_gen_dir/chrome"
   outputs = [
     "grit/browser_resources.h",
     "browser_resources.pak",
   ]
 
   omnibox_mojom_file = "$root_gen_dir/chrome/browser/ui/webui/omnibox/omnibox.mojom.js"
 
   grit_flags = [
     "-E", "about_credits_file=" +
           rebase_path(about_credits_file, root_build_dir),
@@ skipping 30 matching lines @@
 # TODO(GYP) write internal action
 if (false) {  #if (is_chrome_branded) {
   action("chrome_internal_resources_gen") {
     # TODO(GYP)
   }
 } else {
   group("chrome_internal_resources_gen") {
     # Empty placeholder.
   }
 }