Created multi-process-friendly PowerMonitor interface.

base/power_monitor/power_monitor_posix.cc

Index: base/power_monitor/power_monitor_posix.cc
diff --git a/base/power_monitor/power_monitor_posix.cc b/base/power_monitor/power_monitor_posix.cc
deleted file mode 100644
index affebea82fd42e00dadcf22f1106c8e4e769065b..0000000000000000000000000000000000000000
--- a/base/power_monitor/power_monitor_posix.cc
+++ /dev/null
@@ -1,14 +0,0 @@
-// Copyright 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 "base/power_monitor/power_monitor.h"
-
-namespace base {
-
-bool PowerMonitor::IsBatteryPower() {
-  NOTIMPLEMENTED();
-  return false;
-}
-
-}  // namespace base