IDL build: Split global object computation into core and modules

Source/bindings/idl.gypi

-# 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.
-
-# IDL file lists; see: http://www.chromium.org/developers/web-idl-interfaces
-
-{
-  'includes': [
-    '../core/core.gypi',
-    '../modules/modules.gypi',
-  ],
-
-  'variables': {
-    # Main interface IDL files (excluding dependencies and testing)
-    # are included as properties on global objects, and in aggregate bindings
-    # FIXME: split into core vs. modules http://crbug.com/358074
-    'main_interface_idl_files': [
-      '<@(core_idl_files)',
-      '<@(modules_idl_files)',
-    ],
-    # Write lists of main IDL files to a file, so that the command lines don't
-    # exceed OS length limits.
-    'main_interface_idl_files_list': '<|(main_interface_idl_files_list.tmp <@(main_interface_idl_files))',
-  },
-}