Used oneof in blimp_message.proto

blimp/common/create_blimp_message_unittest.cc

Index: blimp/common/create_blimp_message_unittest.cc
diff --git a/blimp/common/create_blimp_message_unittest.cc b/blimp/common/create_blimp_message_unittest.cc
index d2b57dc5488ad63b68cb4830e1867dd8735a1174..315b9d295dca0c6cfb45d2f230396c2a74db1f21 100644
--- a/blimp/common/create_blimp_message_unittest.cc
+++ b/blimp/common/create_blimp_message_unittest.cc
@@ -82,9 +82,9 @@ TEST(CreateBlimpMessageTest, StartConnectionMessage) {
   std::unique_ptr<BlimpMessage> message =
       CreateStartConnectionMessage(client_token, protocol_version);
   EXPECT_NE(nullptr, message);
-  EXPECT_EQ(BlimpMessage::PROTOCOL_CONTROL, message->type());
-  EXPECT_EQ(ProtocolControlMessage::START_CONNECTION,
-            message->protocol_control().type());
+  EXPECT_EQ(BlimpMessage::kProtocolControl, message->feature_case());
+  EXPECT_EQ(ProtocolControlMessage::kStartConnection,
+            message->protocol_control().connection_message_case());
   EXPECT_EQ(client_token,
             message->protocol_control().start_connection().client_token());
   EXPECT_EQ(protocol_version,