[Blimp Net] Add EngineAuthHandler.

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 1db89566f135fe26cfc4691ba79c09a5be9a1c4a..424b078a563dd325302bab1871fe66d95c6eb1af 100644
--- a/blimp/common/create_blimp_message_unittest.cc
+++ b/blimp/common/create_blimp_message_unittest.cc
@@ -40,5 +40,20 @@ TEST(CreateBlimpMessageTest, RenderWidgetMessage) {
   EXPECT_EQ(kTabId, message->target_tab_id());
 }
 
+TEST(CreateBlimpMessageTest, StartConnectionMessage) {
+  std::string client_token("token");
+  int protocol_version = 1;

[Wez, 2015/12/08 22:59:59]

nit: These can both be const, I think; the string can probably be const char*,
and will be implicitly converted when necessary.

[haibinlu, 2015/12/09 00:02:33]

Done.

+  scoped_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(client_token,
+            message->protocol_control().start_connection().client_token());
+  EXPECT_EQ(protocol_version,
+            message->protocol_control().start_connection().protocol_version());
+}
+
 }  // namespace
 }  // namespace blimp