IDL build: factor out interface_info actions into GYP templates

Source/bindings/scripts/interfaces_info_individual.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.
+#
+# This file is meant to be included into a target to provide an action
+# to compute information about individual interfaces defined in a component.
+#
+# To use this, create a gyp target with the following form:
+# {
+#   'target_name': 'interfaces_info_individual_component',
+#   'dependencies': [
+#     'generated_idls_target',
+#   ],
+#   'variables': {
+#     'static_idl_files': '<(component_static_idl_files)',
+#     'generated_idl_files': '<(component_generated_idl_files)',
+#     'component_dir': 'component',
+#     'output_file':
+#       '<(bindings_core_output_dir)/InterfacesInfoComponentIndividual.pickle',
+#   },
+#   'includes': ['path/to/this/gypi/file'],
+# },
+#
+# Required variables:
+#  static_idl_files - All static .idl files for the component, including
+#    dependencies and testing.
+#  generated_idl_files - All generated .idl files for the component.
+#    (Must be separate from static because build dir not know at gyp time.)
+#  component_dir - Relative directory for component, e.g., 'core'.
+#  output_file - Pickle file containing output.
+#
+# Design document: http://www.chromium.org/developers/design-documents/idl-build
+
+{
+  'type': 'none',
+  'actions': [{
+    'action_name': 'compute_<(_target_name)',
+    'message': 'Computing global information about individual IDL files for <(_target_name)',
+    'variables': {
+      'static_idl_files_list':
+        '<|(<(_target_name)_static_idl_files_list.tmp <@(static_idl_files))',
+    },
+    'inputs': [
+      '<(bindings_scripts_dir)/compute_interfaces_info_individual.py',
+      '<(bindings_scripts_dir)/utilities.py',
+      '<(static_idl_files_list)',
+      '<@(static_idl_files)',
+      '<@(generated_idl_files)',
+    ],
+    'outputs': [
+      '<(output_file)',
+    ],
+
+    'action': [
+      'python',
+      '<(bindings_scripts_dir)/compute_interfaces_info_individual.py',
+      '--component-dir',
+      '<(component_dir)',
+      '--idl-files-list',
+      '<(static_idl_files_list)',
+      '--interfaces-info-file',
+      '<(output_file)',
+      '--write-file-only-if-changed',
+      '<(write_file_only_if_changed)',
+      '--',
+      # Generated files must be passed at command line
+      '<@(generated_idl_files)',
+    ],
+  }],
+}