Implement powerMonitor "suspend"/"resume" events for Linux.

atom/browser/lib/power_observer_linux.h

@@ -0,0 +1,42 @@
+// Copyright (c) 2017 GitHub, Inc.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#ifndef ATOM_BROWSER_LIB_POWER_OBSERVER_LINUX_H_
+#define ATOM_BROWSER_LIB_POWER_OBSERVER_LINUX_H_
+
+#include <string>
+
+#include "base/macros.h"
+#include "base/memory/weak_ptr.h"
+#include "base/power_monitor/power_observer.h"
+#include "dbus/bus.h"
+#include "dbus/message.h"
+#include "dbus/object_proxy.h"
+
+namespace atom {
+
+class PowerObserverLinux : public base::PowerObserver {
+ public:
+  PowerObserverLinux();
+
+ private:
+  void TakeSleepLock();
+  void OnLoginServiceAvailable(bool available);
+  void OnInhibitResponse(base::ScopedFD* scoped_fd, dbus::Response* response);
+  void OnPrepareForSleep(dbus::Signal* signal);
+  void OnSignalConnected(const std::string& interface,
+                         const std::string& signal,
+                         bool success);
+
+  scoped_refptr<dbus::Bus> bus_;
+  scoped_refptr<dbus::ObjectProxy> logind_;
+  std::string lock_owner_name_;
+  base::ScopedFD sleep_lock_;
+  base::WeakPtrFactory<PowerObserverLinux> weak_ptr_factory_;
+  DISALLOW_COPY_AND_ASSIGN(PowerObserverLinux);
+};
+
+}  // namespace atom
+
+#endif  // ATOM_BROWSER_LIB_POWER_OBSERVER_LINUX_H_