Issue 2235 - Update jsshell to ESR31 to support new generator syntax

utils.py

Index: utils.py
===================================================================
--- a/utils.py
+++ b/utils.py
@@ -27,7 +27,7 @@
   if sys.platform not in platform_map:
     raise Exception('Unknown platform, is there a JS shell version for it?')
 
-  download_url = 'https://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/2014/04/2014-04-14-00-05-01-mozilla-esr24/jsshell-%s.zip' % platform_map[sys.platform]
+  download_url = 'https://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/2015/03/2015-03-29-mozilla-esr31-debug/jsshell-%s.zip' % platform_map[sys.platform]

[Wladimir Palant, 2015/03/31 14:28:37]

Using a debug build isn't a great idea. How about
https://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/2015/02/2015-02-25-00...
Not sure why there are no more recent release builds, let's hope these are
simply only generated when there are changes in the branch. Otherwise the next
update might get slightly problematic.

Note that the directory you link to above has jsshell-mac64.zip instead of
jsshell-mac.zip so you would have to adjust the platform_map dictionary. No such
change is required for the directory I proposed.

[Sebastian Noack, 2015/03/31 17:54:23]

Sure. I just didn't find a non-debug esr31 build, assuming that there wasn't
one.

   data = StringIO(urllib.urlopen(download_url).read())
   zip = zipfile.ZipFile(data)
   zip.extractall(shell_dir)