[Chromoting] Add ProcessStatsDispatcher to send process stats to the client

remoting/protocol/process_stats_adapter.cc

Index: remoting/protocol/process_stats_adapter.cc
diff --git a/remoting/protocol/process_stats_adapter.cc b/remoting/protocol/process_stats_adapter.cc
new file mode 100644
index 0000000000000000000000000000000000000000..653b47e4a8eeee7af4459c241a58bedfa62fac51
--- /dev/null
+++ b/remoting/protocol/process_stats_adapter.cc
@@ -0,0 +1,37 @@
+// Copyright 2017 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/process_stats_adapter.h"
+
+#include <utility>
+
+#include "base/logging.h"
+#include "remoting/base/constants.h"
+#include "remoting/proto/control.pb.h"
+#include "remoting/proto/process_stats.pb.h"
+#include "remoting/protocol/client_stub.h"
+
+namespace remoting {
+namespace protocol {
+
+ProcessStatsAdapter::ProcessStatsAdapter(ClientStub* client_stub)
+    : client_stub_(client_stub) {
+  DCHECK(client_stub_);
+}
+ProcessStatsAdapter::~ProcessStatsAdapter() = default;
+
+void ProcessStatsAdapter::OnProcessStats(
+    const AggregatedProcessResourceUsage& usage) {
+  protocol::ExtensionMessage message;
+  message.set_type(kProcessStatsExtensionMessageType);
+  std::string data;
+  bool result = usage.SerializeToString(&data);
+  DCHECK(result);
+  message.set_data(std::move(data));
+
+  client_stub_->DeliverHostMessage(message);
+}
+
+}  // namespace protocol
+}  // namespace remoting