IDL build: factor out global constructors action into a GYP template

Source/bindings/core/generated.gyp

 # 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.
 
 # Generate IDL interfaces info for core, used to generate bindings
 #
 # Design doc: http://www.chromium.org/developers/design-documents/idl-build
 
 {
   'includes': [
@@ skipping 11 matching lines @@
     'target_name': 'core_global_objects',
     'variables': {
       'idl_files': '<(core_idl_files)',
       'output_file': '<(bindings_core_output_dir)/GlobalObjectsCore.pickle',
     },
     'includes': ['../../bindings/scripts/global_objects.gypi'],
   },
 ################################################################################
   {
     'target_name': 'core_global_constructors_idls',
-    'type': 'none',
     'dependencies': [
-        'core_global_objects',
+      'core_global_objects',
     ],
-    'actions': [{
-      'action_name': 'generate_core_global_constructors_idls',
-      'inputs': [
-        '<(bindings_scripts_dir)/generate_global_constructors.py',
-        '<(bindings_scripts_dir)/utilities.py',
-        # Only includes main IDL files (exclude dependencies and testing,
-        # which should not appear on global objects).
-        '<(core_idl_files_list)',
-        '<@(core_idl_files)',
+    'variables': {
+      'idl_files': '<(core_idl_files)',
+      'global_objects_file':
         '<(bindings_core_output_dir)/GlobalObjectsCore.pickle',
-      ],
-      'outputs': [
-        '<@(core_global_constructors_generated_idl_files)',
-        '<@(core_global_constructors_generated_header_files)',
-      ],
-      'action': [
-        'python',
-        '<(bindings_scripts_dir)/generate_global_constructors.py',
-        '--idl-files-list',
-        '<(core_idl_files_list)',
-        '--global-objects-file',
-        '<(bindings_core_output_dir)/GlobalObjectsCore.pickle',
-        '--write-file-only-if-changed',
-        '<(write_file_only_if_changed)',
-        '--',
+      'global_names_idl_files': [
         'Window',
         '<(blink_core_output_dir)/WindowCoreConstructors.idl',
         'SharedWorkerGlobalScope',
         '<(blink_core_output_dir)/SharedWorkerGlobalScopeCoreConstructors.idl',
         'DedicatedWorkerGlobalScope',
         '<(blink_core_output_dir)/DedicatedWorkerGlobalScopeCoreConstructors.idl',
-       ],
-       'message':
-         'Generating IDL files for constructors on global objects from core',
-      }]
+      ],
+      'outputs': [
+        '<@(core_global_constructors_generated_idl_files)',
+        '<@(core_global_constructors_generated_header_files)',
+      ],
+    },
+    'includes': ['../../bindings/scripts/global_constructors.gypi'],
   },
 ################################################################################
   {
     'target_name': 'interfaces_info_individual_core',
     'type': 'none',
     'dependencies': [
       '../../core/core_generated.gyp:generated_testing_idls',
       'core_global_constructors_idls',
     ],
     'actions': [{
@@ skipping 22 matching lines @@
         '--',
         # Generated files must be passed at command line
         '<@(core_generated_idl_files)',
       ],
       'message': 'Computing global information about individual IDL files',
       }]
   },
 ################################################################################
   ],  # targets
 }