[Chromoting] Use device::PowerSaveBlocker to block screen saver

remoting/host/host_power_save_blocker_unittest.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 "remoting/host/host_power_save_blocker.h"
+
+#include <memory>
+
+#include "base/logging.h"
+#include "base/message_loop/message_loop.h"
+#include "base/threading/thread.h"
+#include "remoting/host/fake_host_status_monitor.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace remoting {
+
+class HostPowerSaveBlockerTest : public testing::Test {
+ public:
+  HostPowerSaveBlockerTest();
+
+ protected:
+  bool is_activated() const;
+
+  void SetUp() override;
+
+  base::MessageLoopForUI ui_message_loop_;
+  base::Thread blocking_thread_;
+  FakeHostStatusMonitor monitor_;
+  std::unique_ptr<HostPowerSaveBlocker> blocker_;
+};
+
+HostPowerSaveBlockerTest::HostPowerSaveBlockerTest()
+    : blocking_thread_("block-thread") {}
+
+void HostPowerSaveBlockerTest::SetUp() {
+  ASSERT_TRUE(blocking_thread_.StartWithOptions(
+                  base::Thread::Options(base::MessageLoop::TYPE_IO, 0)) &&
+              blocking_thread_.WaitUntilThreadStarted());
+  blocker_.reset(new HostPowerSaveBlocker(monitor_.AsWeakPtr(),
+                                          ui_message_loop_.task_runner(),
+                                          blocking_thread_.task_runner()));
+}
+
+bool HostPowerSaveBlockerTest::is_activated() const {
+  return !!blocker_->blocker_;
+}
+
+TEST_F(HostPowerSaveBlockerTest, Activated) {
+  blocker_->OnClientConnected("jid/jid1@jid2.org");
+  ASSERT_TRUE(is_activated());
+  blocker_->OnClientDisconnected("jid/jid3@jid4.org");
+  ASSERT_FALSE(is_activated());
+}
+
+}  // namespace remoting