Revert IDL compiler build flow to Perl, rename 'deprecated'

Source/bindings/scripts/unstable/v8_interface.py

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-"""Generate template values for an interface."""
+"""Generate template values for an interface.
+
+UNSTABLE: Not currently used in build.
+This is a rewrite of the Perl IDL compiler in Python, but is not complete.
+Once it is complete, we will switch all IDL files over to Python at once.
+Until then, please work on the Perl IDL compiler.
+For details, see bug http://crbug.com/239771
+"""
 
 import v8_attributes
 from v8_utilities import cpp_class_name, runtime_enable_function_name, v8_class_name
 
 
 INTERFACE_H_INCLUDES = set([
     'bindings/v8/V8Binding.h',
     'bindings/v8/V8DOMWrapper.h',  # FIXME: necessary?
     'bindings/v8/WrapperTypeInfo.h',  # FIXME: necessary?
 ])
@@ skipping 43 matching lines @@
     enabled_at_runtime = 'EnabledAtRuntime' in constant.extended_attributes
     constant_parameter = {
         'name': constant.name,
         # FIXME: use 'reflected_name' as correct 'name'
         'reflected_name': reflected_name,
         'value': value,
         'enabled_at_runtime': enabled_at_runtime,
         'runtime_enable_function_name': runtime_enable_function_name(constant) if enabled_at_runtime else None,
     }
     return constant_parameter