Implementation and fixes for Blimp client/engine E2E communication.

blimp/net/blimp_message_demultiplexer_unittest.cc

Index: blimp/net/blimp_message_demultiplexer_unittest.cc
diff --git a/blimp/net/blimp_message_demultiplexer_unittest.cc b/blimp/net/blimp_message_demultiplexer_unittest.cc
index b3248b7f8ec9ccae5497b38d7c31c650d059b4d4..95e63532724bdfd8784607bc8142716a6f093e47 100644
--- a/blimp/net/blimp_message_demultiplexer_unittest.cc
+++ b/blimp/net/blimp_message_demultiplexer_unittest.cc
@@ -58,5 +58,12 @@ TEST_F(BlimpMessageDemultiplexerTest, ProcessMessageFailed) {
   EXPECT_EQ(net::ERR_FAILED, cb2.WaitForResult());
 }
 
+TEST_F(BlimpMessageDemultiplexerTest, ProcessMessageNoRegisteredHandler) {
+  net::TestCompletionCallback cb;
+  scoped_ptr<BlimpMessage> unknown_message(new BlimpMessage);
+  unknown_message->set_type(BlimpMessage::UNKNOWN);
+  demux_.ProcessMessage(std::move(unknown_message), cb.callback());
+  EXPECT_EQ(net::ERR_NOT_IMPLEMENTED, cb.WaitForResult());
+}
 
 }  // namespace blimp