Prepare for moving grit to its own open-source project. This mostly

tools/gritsettings/resource_ids

 # Copyright (c) 2011 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
+# this file to the base of your checkout.
+#
 # http://msdn.microsoft.com/en-us/library/t2zechd4(VS.71).aspx says that the
 # range for IDR_ is 1 to 28,671 and the range for IDS_ is 1 to 32,767 and
 # common convention starts practical use of IDs at 100 or 101.
 {
+  "SRCDIR": "../..",
+
   "chrome/browser/browser_resources.grd": {
     "includes": [500],
   },
   "chrome/browser/resources/component_extension_resources.grd": {
     "includes": [1000],
   },
   "chrome/browser/resources/net_internals_resources.grd": {
     "includes": [1500],
   },
   "chrome/browser/resources/shared_resources.grd": {
@@ skipping 137 matching lines @@
     "includes": [23500],
   },
   # All standard and large theme resources should have the same IDs.
   "ui/resources/ui_resources_standard.grd": {
     "includes": [24000],
   },
   "ui/resources/ui_resources_large.grd": {
     "includes": [24000],
   },
 }