Replace custom blob gRPC API with ByteStream

client/third_party/google/auth/__init__.py

-# Copyright 2014 Google Inc. All Rights Reserved.
+# Copyright 2016 Google Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 #      http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "1.4.2"
+"""Google Auth Library for Python."""
+
+import logging
+
+from google.auth._default import default
+
+
+__all__ = [
+    'default',
+]
+
+
+# Set default logging handler to avoid "No handler found" warnings.
+logging.getLogger(__name__).addHandler(logging.NullHandler())