Replace custom blob gRPC API with ByteStream

client/third_party/google/auth/exceptions.py

Index: client/third_party/google/auth/exceptions.py
diff --git a/client/third_party/oauth2client/__init__.py b/client/third_party/google/auth/exceptions.py
similarity index 51%
copy from client/third_party/oauth2client/__init__.py
copy to client/third_party/google/auth/exceptions.py
index f7c36c1bff2e62aaa1a7ba247131dd07e1f81f3f..2be9fd6df4037a46b897dead1403808847e89e07 100644
--- a/client/third_party/oauth2client/__init__.py
+++ b/client/third_party/google/auth/exceptions.py
@@ -1,4 +1,4 @@
-# Copyright 2015 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.
@@ -12,12 +12,21 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-"""Client library for using OAuth2, especially with Google APIs."""
+"""Exceptions used in the google.auth package."""
 
-__version__ = '1.5.2'
 
-GOOGLE_AUTH_URI = 'https://accounts.google.com/o/oauth2/auth'
-GOOGLE_DEVICE_URI = 'https://accounts.google.com/o/oauth2/device/code'
-GOOGLE_REVOKE_URI = 'https://accounts.google.com/o/oauth2/revoke'
-GOOGLE_TOKEN_URI = 'https://accounts.google.com/o/oauth2/token'
-GOOGLE_TOKEN_INFO_URI = 'https://www.googleapis.com/oauth2/v2/tokeninfo'
+class GoogleAuthError(Exception):
+    """Base class for all google.auth errors."""
+
+
+class TransportError(GoogleAuthError):
+    """Used to indicate an error occurred during an HTTP request."""
+
+
+class RefreshError(GoogleAuthError):
+    """Used to indicate that an refreshing the credentials' access token
+    failed."""
+
+
+class DefaultCredentialsError(GoogleAuthError):
+    """Used to indicate that acquiring default credentials failed."""