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

Source/bindings/scripts/unstable/v8_utilities.py

Index: Source/bindings/scripts/unstable/v8_utilities.py
diff --git a/Source/bindings/scripts/v8_utilities.py b/Source/bindings/scripts/unstable/v8_utilities.py
similarity index 91%
rename from Source/bindings/scripts/v8_utilities.py
rename to Source/bindings/scripts/unstable/v8_utilities.py
index 93b85ab2d05d7fd043ebc4e01e86cab1b3244395..28ecd6d398b94c6e4dd7b410b682eedaeece5e08 100644
--- a/Source/bindings/scripts/v8_utilities.py
+++ b/Source/bindings/scripts/unstable/v8_utilities.py
@@ -26,6 +26,15 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+"""Functions shared by various parts of the code generator.
+
+FIXME: 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
+"""
+
 # FIXME: eliminate this file if possible
 
 import v8_types