Revert of Upgrade 3rd packages

third_party/google_api_python_client/googleapiclient/channel.py

 """Channel notifications support.
 
 Classes and functions to support channel subscriptions and notifications
 on those channels.
 
 Notes:
   - This code is based on experimental APIs and is subject to change.
   - Notification does not do deduplication of notification ids, that's up to
     the receiver.
   - Storing the Channel between calls is up to the caller.
@@ skipping 42 matching lines @@
 
 Example of unsubscribing.
 
   service.channels().stop(channel.body())
 """
 
 import datetime
 import uuid
 
 from googleapiclient import errors
-from third_party.oauth2client import util
+from ...oauth2client import util
 
 
 # The unix time epoch starts at midnight 1970.
 EPOCH = datetime.datetime.utcfromtimestamp(0)
 
 # Map the names of the parameters in the JSON channel description to
 # the parameter names we use in the Channel class.
 CHANNEL_PARAMS = {
     'address': 'address',
     'id': 'id',
@@ skipping 202 matching lines @@
       delta = expiration - EPOCH
       expiration_ms = delta.microseconds/1000 + (
           delta.seconds + delta.days*24*3600)*1000
       if expiration_ms < 0:
         expiration_ms = 0
 
     return Channel('web_hook', str(uuid.uuid4()),
                    token, url, expiration=expiration_ms,
                    params=params)