Monitor sleep/wake on Mac. Should fix some networking issues arising after sl...

app/system_monitor.h

Index: app/system_monitor.h
===================================================================
--- app/system_monitor.h	(revision 67272)
+++ app/system_monitor.h	(working copy)
@@ -1,4 +1,4 @@
-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2010 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.
 
@@ -94,6 +94,11 @@
   void ProcessPowerMessage(PowerEvent event_id);
 
  private:
+#if defined(OS_MACOSX)
+  void PlatformInit();
+  void PlatformDestroy();
+#endif
+
   // Platform-specific method to check whether the system is currently
   // running on battery power.  Returns true if running on batteries,
   // false otherwise.