Decouple Blimp transport output from BlimpConnections using MessagePort.

blimp/net/message_port.cc

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "blimp/net/message_port.h"
+
+#include <utility>
+
+#include "base/memory/ptr_util.h"
+#include "blimp/net/compressed_packet_reader.h"
+#include "blimp/net/compressed_packet_writer.h"
+#include "blimp/net/packet_reader.h"
+#include "blimp/net/packet_writer.h"
+#include "blimp/net/stream_packet_reader.h"
+#include "blimp/net/stream_packet_writer.h"
+#include "net/socket/stream_socket.h"
+
+namespace blimp {
+namespace {
+
+class CompressedStreamSocketMessagePort : public MessagePort {
+ public:
+  explicit CompressedStreamSocketMessagePort(
+      std::unique_ptr<net::StreamSocket> socket);
+  ~CompressedStreamSocketMessagePort() override {}
+
+ private:
+  std::unique_ptr<net::StreamSocket> socket_;
+
+  DISALLOW_COPY_AND_ASSIGN(CompressedStreamSocketMessagePort);
+};
+
+CompressedStreamSocketMessagePort::CompressedStreamSocketMessagePort(
+    std::unique_ptr<net::StreamSocket> socket)
+    : MessagePort(base::MakeUnique<CompressedPacketReader>(
+                      base::MakeUnique<StreamPacketReader>(socket.get())),
+                  base::MakeUnique<CompressedPacketWriter>(
+                      base::MakeUnique<StreamPacketWriter>(socket.get()))),
+      socket_(std::move(socket)) {}
+
+}  // namespace
+
+// static
+std::unique_ptr<MessagePort> MessagePort::CreateForStreamSocketWithCompression(
+    std::unique_ptr<net::StreamSocket> socket) {
+  return base::MakeUnique<CompressedStreamSocketMessagePort>(std::move(socket));
+}
+
+MessagePort::MessagePort(std::unique_ptr<PacketReader> reader,
+                         std::unique_ptr<PacketWriter> writer)
+    : reader_(std::move(reader)), writer_(std::move(writer)) {}
+
+MessagePort::~MessagePort() {}
+
+}  // namespace blimp