Blimp: Add BlobChannel Helium messages and delegate impls.

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..bd24c6bddfe14e11e222700cf2447b79b42d2246 100644
--- a/blimp/common/create_blimp_message_unittest.cc
+++ b/blimp/common/create_blimp_message_unittest.cc
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "base/memory/ptr_util.h"
 #include "blimp/common/create_blimp_message.h"
 #include "blimp/common/proto/blimp_message.pb.h"
 #include "blimp/common/proto/compositor.pb.h"
@@ -91,5 +92,15 @@ TEST(CreateBlimpMessageTest, StartConnectionMessage) {
             message->protocol_control().start_connection().protocol_version());
 }
 
+TEST(CreateBlimpMessageTest, BlobChannelMessage) {
+  BlobChannelMessage* details = new BlobChannelMessage;
+  std::unique_ptr<BlimpMessage> message =
+      CreateBlimpMessage(base::WrapUnique(details));
+  EXPECT_NE(nullptr, message);

[Wez, 2016/05/20 21:46:17]

nit: EXPECT_TRUE(message) or even ASSERT_TRUE(message), since the other
expectations will crash if !message.

+  EXPECT_EQ(details, &message->blob_channel());
+  EXPECT_EQ(BlimpMessage::BLOB_CHANNEL, message->type());
+}
+
+
 }  // namespace
 }  // namespace blimp