Add client and host dispatchers for video_stats channel to send video stats from host to client.

remoting/protocol/host_video_stats_dispatcher.cc

Index: remoting/protocol/host_video_stats_dispatcher.cc
diff --git a/remoting/protocol/host_video_stats_dispatcher.cc b/remoting/protocol/host_video_stats_dispatcher.cc
new file mode 100644
index 0000000000000000000000000000000000000000..2185fb3be82f54b1f402f5b2972466420e56090f
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+++ b/remoting/protocol/host_video_stats_dispatcher.cc
@@ -0,0 +1,40 @@
+// 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 "remoting/protocol/host_video_stats_dispatcher.h"
+
+#include <utility>
+
+#include "base/bind.h"
+#include "net/socket/stream_socket.h"
+#include "remoting/base/compound_buffer.h"
+#include "remoting/base/constants.h"
+#include "remoting/proto/video_stats.pb.h"
+#include "remoting/protocol/frame_stats.h"
+#include "remoting/protocol/message_pipe.h"
+#include "remoting/protocol/message_serialization.h"
+#include "remoting/protocol/video_stats_stub.h"
+
+namespace remoting {
+namespace protocol {
+
+HostVideoStatsDispatcher::HostVideoStatsDispatcher(
+    const std::string& stream_name)
+    : ChannelDispatcherBase(kVideoStatsChannelNamePrefix + stream_name) {}
+
+HostVideoStatsDispatcher::~HostVideoStatsDispatcher() {}
+
+void HostVideoStatsDispatcher::OnVideoFrameStats(uint32_t frame_id,
+                                                 const HostFrameStats& stats) {
+  FrameStatsMessage message;
+  message.set_frame_id(frame_id);
+  stats.ToFrameStatsMessage(&message);
+  message_pipe()->Send(&message, base::Closure());
+}
+
+void HostVideoStatsDispatcher::OnIncomingMessage(
+    std::unique_ptr<CompoundBuffer> message) {}
+
+}  // namespace protocol
+}  // namespace remoting