Revert 156744 - chromeos: Use EventRouterForwarder to disptch systemPrivate extension events

chrome/browser/extensions/system/system_api.h

Index: chrome/browser/extensions/system/system_api.h
===================================================================
--- chrome/browser/extensions/system/system_api.h	(revision 156864)
+++ chrome/browser/extensions/system/system_api.h	(working copy)
@@ -35,16 +35,9 @@
   virtual bool RunImpl() OVERRIDE;
 };
 
-// Dispatches systemPrivate.onBrightnessChanged event for extensions.
 void DispatchBrightnessChangedEvent(int brightness, bool user_initiated);
-
-// Dispatches systemPrivate.onVolumeChanged event for extensions.
 void DispatchVolumeChangedEvent(double volume, bool is_volume_muted);
-
-// Dispatches systemPrivate.onScreenChanged event for extensions.
 void DispatchScreenUnlockedEvent();
-
-// Dispatches systemPrivate.onWokeUp event for extensions.
 void DispatchWokeUpEvent();
 
 }  // namespace extensions