Created multi-process-friendly PowerMonitor interface.

content/common/power_monitor_message_broadcaster.cc

Index: content/common/power_monitor_message_broadcaster.cc
diff --git a/content/common/power_monitor_message_broadcaster.cc b/content/common/power_monitor_message_broadcaster.cc
new file mode 100644
index 0000000000000000000000000000000000000000..bd9e00a41d4f788d5356e2f338d63f034f65b07f
--- /dev/null
+++ b/content/common/power_monitor_message_broadcaster.cc
@@ -0,0 +1,39 @@
+// Copyright 2013 The Chromium Authors. All rights reserved.

[jam, 2013/07/17 00:29:42]

why is this file in content/common instead of content/browser?

[bajones, 2013/07/19 22:44:56]

Good catch, thanks. A much earlier version of the code required this to be in
common (see comment 3), but that's no longer the case. Moved.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "content/common/power_monitor_message_broadcaster.h"
+
+#include "base/power_monitor/power_monitor.h"
+#include "content/common/power_monitor_messages.h"
+#include "ipc/ipc_sender.h"
+
+namespace content {
+
+PowerMonitorMessageBroadcaster::PowerMonitorMessageBroadcaster(
+    IPC::Sender* sender)
+    : sender_(sender) {
+  base::PowerMonitor* power_monitor = base::PowerMonitor::Get();
+  if (power_monitor)
+    power_monitor->AddObserver(this);
+}
+
+PowerMonitorMessageBroadcaster::~PowerMonitorMessageBroadcaster() {
+  base::PowerMonitor* power_monitor = base::PowerMonitor::Get();
+  if (power_monitor)
+    power_monitor->RemoveObserver(this);
+}
+
+void PowerMonitorMessageBroadcaster::OnPowerStateChange(bool on_battery_power) {
+  sender_->Send(new PowerMonitorMsg_PowerStateChange(on_battery_power));
+}
+
+void PowerMonitorMessageBroadcaster::OnSuspend() {
+  sender_->Send(new PowerMonitorMsg_Suspend());
+}
+
+void PowerMonitorMessageBroadcaster::OnResume() {
+  sender_->Send(new PowerMonitorMsg_Resume());
+}
+
+}  // namespace content