Move extensions_strings.grd to extensions/strings/

tools/gritsettings/resource_ids

 # Copyright (c) 2012 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.
 #
 # This file is used to assign starting resource ids for resources and strings
 # used by Chromium.  This is done to ensure that resource ids are unique
 # across all the grd files.  If you are adding a new grd file, please add
 # a new entry to this file.
 #
 # The first entry in the file, SRCDIR, is special: It is a relative path from
@@ skipping 197 matching lines @@
   "extensions/extensions_resources.grd": {
     "includes": [25250],
   },
   "extensions/browser/resources/extensions_browser_resources.grd": {
     "structures": [25450],
   },
   "extensions/renderer/resources/extensions_renderer_resources.grd": {
     "includes": [25500],
     "structures": [25600],
   },
-  "extensions/extensions_strings.grd": {
+  "extensions/strings/extensions_strings.grd": {
     "messages": [25650],
   },
   "extensions/shell/app_shell_resources.grd": {
     "includes": [26050],
   },
   "chrome/browser/resources/password_manager_internals_resources.grd": {
     "includes": [26350],
   },
   "device/bluetooth/bluetooth_strings.grd": {
     "messages": [26650],
@@ skipping 50 matching lines @@
   },
   "chrome/browser/resources/settings/settings_resources.grd": {
     "structures": [30650],
   },
   "headless/lib/resources/headless_lib_resources.grd": {
     "includes": [30670],
   },
 
   # Resource ids starting at 31000 are reserved for projects built on Chromium.
 }