IDL: Use IdlReader to compute interface_info_individual

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 41 matching lines @@
     'includes': ['../../bindings/scripts/global_constructors.gypi'],
   },
 ################################################################################
   {
     'target_name': 'interfaces_info_individual_core',
     'dependencies': [
       '../../core/core_generated.gyp:generated_testing_idls',
       'core_global_constructors_idls',
     ],
     'variables': {
+      'cache_directory': '<(bindings_core_output_dir)/../scripts',

[bashi, 2014/10/21 05:46:55]

'cache_directory' contains 'lextab.py', which is required by IdlReader. (Or
IdlReader generate it if it doesn't exist)

[Jens Widell, 2014/10/21 10:59:39]

The gyp target that generates lextab.py is 'cache_lex_yacc_tables'.

You should add an explicit dependency on it, unless this target already does
depend on it in some other reliable way. The reason for that is that 'lextab.py'
is only regenerated automatically if it doesn't exist; it isn't regenerated if
it's "just" out-of-date.

The 'cache_lex_yacc_tables' target takes care of that. It also avoids the
possibility of a race between multiple targets generating lextab.py in parallel.

       'static_idl_files': '<(core_static_idl_files)',
       'generated_idl_files': '<(core_generated_idl_files)',
       'output_file':
         '<(bindings_core_output_dir)/InterfacesInfoCoreIndividual.pickle',
     },
     'includes': ['../../bindings/scripts/interfaces_info_individual.gypi'],
   },
 ################################################################################
   ],  # targets
 }