chromeos: Turn off displays on suspend

ui/display/chromeos/display_configurator.h

Index: ui/display/chromeos/display_configurator.h
diff --git a/ui/display/chromeos/display_configurator.h b/ui/display/chromeos/display_configurator.h
index f97392f35e87488a37daf04cbc46f9512a2761fa..c1e4eee42c0dda0b099b6f49b205b6e7ffab5519 100644
--- a/ui/display/chromeos/display_configurator.h
+++ b/ui/display/chromeos/display_configurator.h
@@ -304,6 +304,7 @@ class DISPLAY_EXPORT DisplayConfigurator : public NativeDisplayObserver {
   // invoked (perhaps synchronously) on completion.
   void SetDisplayPowerInternal(chromeos::DisplayPowerState power_state,
                                int flags,
+                               bool configure_cached_displays,
                                const ConfigurationCallback& callback);
 
   // Configures displays. Invoked by |configure_timer_|.
@@ -422,6 +423,8 @@ class DISPLAY_EXPORT DisplayConfigurator : public NativeDisplayObserver {
   // True if the caller wants to force the display configuration process.
   bool force_configure_;
 
+  bool configure_cached_displays_;
+
   // Most-recently-used display configuration. Note that the actual
   // configuration changes asynchronously.
   DisplayStateList cached_displays_;