IDL compiler: delete Perl compiler, remove unstable/ directory

Source/bindings/scripts/blink_idl_parser.py

Index: Source/bindings/scripts/blink_idl_parser.py
diff --git a/Source/bindings/scripts/unstable/blink_idl_parser.py b/Source/bindings/scripts/blink_idl_parser.py
similarity index 99%
rename from Source/bindings/scripts/unstable/blink_idl_parser.py
rename to Source/bindings/scripts/blink_idl_parser.py
index bf40c68e1b7379d5669807aa54321c2e0921f21c..bbc302138f52452c4f9ca02f2edf3e18bdcda601 100644
--- a/Source/bindings/scripts/unstable/blink_idl_parser.py
+++ b/Source/bindings/scripts/blink_idl_parser.py
@@ -56,13 +56,13 @@ import sys
 
 # PLY is in Chromium src/third_party/ply
 module_path, module_name = os.path.split(__file__)
-third_party = os.path.join(module_path, os.pardir, os.pardir, os.pardir, os.pardir, os.pardir)
+third_party = os.path.join(module_path, os.pardir, os.pardir, os.pardir, os.pardir)
 # Insert at front to override system libraries, and after path[0] == script dir
 sys.path.insert(1, third_party)
 from ply import yacc
 
 # Base parser is in Chromium src/tools/idl_parser
-tools_dir = os.path.join(module_path, os.pardir, os.pardir, os.pardir, os.pardir, os.pardir, os.pardir, 'tools')
+tools_dir = os.path.join(module_path, os.pardir, os.pardir, os.pardir, os.pardir, os.pardir, 'tools')
 sys.path.append(tools_dir)
 from idl_parser.idl_parser import IDLParser, ListFromConcat
 from idl_parser.idl_parser import ParseFile as parse_file