--- ./third_party/WebKit/Source/bindings/derived_sources.gyp.orig	2013-09-09 17:53:37.709978765 +0000
+++ ./third_party/WebKit/Source/bindings/derived_sources.gyp	2013-09-09 17:53:50.540054303 +0000
@@ -57,8 +57,6 @@
     ],
     'compiler_module_files': [
         'scripts/idl_compiler.py',
-        '<(DEPTH)/third_party/ply/lex.py',
-        '<(DEPTH)/third_party/ply/yacc.py',
         '<(DEPTH)/tools/idl_parser/idl_lexer.py',
         '<(DEPTH)/tools/idl_parser/idl_node.py',
         '<(DEPTH)/tools/idl_parser/idl_parser.py',