Network traffic annotation added to OAuth2ApiCallFlow and its subclasses.

google_apis/gaia/oauth2_api_call_flow_unittest.cc

Index: google_apis/gaia/oauth2_api_call_flow_unittest.cc
diff --git a/google_apis/gaia/oauth2_api_call_flow_unittest.cc b/google_apis/gaia/oauth2_api_call_flow_unittest.cc
index 61a704212e3b0c31fea1b8fcff3a53591466a559..c95a14ae5f6d67afb41760fc9892ed18beabebff 100644
--- a/google_apis/gaia/oauth2_api_call_flow_unittest.cc
+++ b/google_apis/gaia/oauth2_api_call_flow_unittest.cc
@@ -98,6 +98,10 @@ class MockApiCallFlow : public OAuth2ApiCallFlow {
       void (const std::string& access_token));
   MOCK_METHOD1(ProcessMintAccessTokenFailure,
       void (const GoogleServiceAuthError& error));
+
+  net::PartialNetworkTrafficAnnotationTag GetNetworkTrafficAnnotationTag() {
+    return PARTIAL_TRAFFIC_ANNOTATION_FOR_TESTS;
+  }
 };
 
 }  // namespace