Use shared memory for moving data over BlobChannel Mojo interface.

blimp/net/blob_channel/mock_blob_channel_sender.cc

Index: blimp/net/blob_channel/mock_blob_channel_sender.cc
diff --git a/blimp/engine/app/switches.cc b/blimp/net/blob_channel/mock_blob_channel_sender.cc
similarity index 56%
copy from blimp/engine/app/switches.cc
copy to blimp/net/blob_channel/mock_blob_channel_sender.cc
index 0cfe19d9ace45eacd3259febe89c82c746ac26b8..7e165d1a773bea423ba65a7aaee85ceeacfa2410 100644
--- a/blimp/engine/app/switches.cc
+++ b/blimp/net/blob_channel/mock_blob_channel_sender.cc
@@ -2,12 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "blimp/engine/app/switches.h"
+#include "blimp/net/blob_channel/mock_blob_channel_sender.h"
 
 namespace blimp {
-namespace engine {
 
-const char kEnginePort[] = "engine-port";
+MockBlobChannelSender::MockBlobChannelSender() {}
+MockBlobChannelSender::~MockBlobChannelSender() {}
 
-}  // namespace engine
 }  // namespace blimp