IDL: Use IdlReader to compute interface_info_individual

Source/bindings/core/generated.gyp

Index: Source/bindings/core/generated.gyp
diff --git a/Source/bindings/core/generated.gyp b/Source/bindings/core/generated.gyp
index 34bfcfa79df542e7274fa13115bdea30a4ac15c3..a54cddca765b91343b0af8143b2834fa885fc4d1 100644
--- a/Source/bindings/core/generated.gyp
+++ b/Source/bindings/core/generated.gyp
@@ -59,6 +59,7 @@
       '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it's "just" out-of-date.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':