Created multi-process-friendly PowerMonitor interface.

content/common/power_monitor_message_filter.cc

Index: content/common/power_monitor_message_filter.cc
diff --git a/content/common/power_monitor_message_filter.cc b/content/common/power_monitor_message_filter.cc
new file mode 100644
index 0000000000000000000000000000000000000000..caca4148a17e30c1c59ee8f3b0819ce50fa56c50
--- /dev/null
+++ b/content/common/power_monitor_message_filter.cc
@@ -0,0 +1,43 @@
+// Copyright (c) 2013 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 "content/common/power_monitor_message_filter.h"
+
+#include "content/common/power_monitor_client.h"
+#include "content/common/power_monitor_messages.h"
+
+namespace content {
+
+PowerMonitorMessageFilter::PowerMonitorMessageFilter()
+  : client_(PowerMonitorClient::Get()) {
+}
+
+PowerMonitorMessageFilter::~PowerMonitorMessageFilter() {
+}
+
+bool PowerMonitorMessageFilter::OnMessageReceived(const IPC::Message& message) {
+  bool msg_is_ok = true;
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP_EX(PowerMonitorMessageFilter, message, msg_is_ok)
+    IPC_MESSAGE_HANDLER(PowerMonitorMsg_PowerStateChange, OnPowerStateChange)
+    IPC_MESSAGE_HANDLER(PowerMonitorMsg_Suspend, OnSuspend)
+    IPC_MESSAGE_HANDLER(PowerMonitorMsg_Resume, OnResume)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP_EX()
+  return handled;
+}
+
+void PowerMonitorMessageFilter::OnPowerStateChange(bool on_battery_power) {
+  client_->NotifyPowerStateChange(on_battery_power);
+}
+
+void PowerMonitorMessageFilter::OnSuspend() {
+  client_->NotifySuspend();
+}
+
+void PowerMonitorMessageFilter::OnResume() {
+  client_->NotifyResume();
+}
+
+}  // namespace content