handle binary stream from urllib.request.urlopen

Python 3 returns bytes by default with urlopen.  Adjust our code to
handle that scenario and decode as necessary.

Bug: https://crbug.com/gerrit/10418
Change-Id: Icf4cd80e7ef92d71a3eefbc6113f1ba11c32eebc

git_config.py

@@ -657,13 +657,14 @@ class Remote(object):
               info = urllib.request.urlopen(info_url, context=context).read()
           else:
               info = urllib.request.urlopen(info_url).read()
-          if info == 'NOT_AVAILABLE' or '<' in info:
+          if info == b'NOT_AVAILABLE' or b'<' in info:
             # If `info` contains '<', we assume the server gave us some sort
             # of HTML response back, like maybe a login page.
             #
             # Assume HTTP if SSH is not enabled or ssh_info doesn't look right.
             self._review_url = http_url
           else:
+            info = info.decode('utf-8')
             host, port = info.split()
             self._review_url = self._SshReviewUrl(userEmail, host, port)
         except urllib.error.HTTPError as e:

repo

@@ -583,7 +583,7 @@ def _DownloadBundle(url, local, quiet):
         print('Get %s' % url, file=sys.stderr)
       while True:
         buf = r.read(8192)
-        if buf == '':
+        if not buf:
           return True
         dest.write(buf)
     finally: