chromeos: Turn off displays on suspend

ui/display/chromeos/display_configurator.h

 // Copyright 2014 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.
 
 #ifndef UI_DISPLAY_CHROMEOS_DISPLAY_CONFIGURATOR_H_
 #define UI_DISPLAY_CHROMEOS_DISPLAY_CONFIGURATOR_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 286 matching lines @@
   class DisplayLayoutManagerImpl;
 
   // Mapping a client to its protection request.
   typedef std::map<ContentProtectionClientId, ContentProtections>
       ProtectionRequests;
 
   // Updates |pending_*| members and applies the passed-in state. |callback| is
   // 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_|.
   void ConfigureDisplays();
 
   // Notifies observers about an attempted state change.
   void NotifyDisplayStateObservers(bool success,
                                    MultipleDisplayState attempted_state);
 
   // Notifies observers about a power state change.
@@ skipping 98 matching lines @@
   // task.
   std::vector<ConfigurationCallback> in_progress_configuration_callbacks_;
 
   std::queue<base::Closure> content_protection_tasks_;
   std::queue<QueryProtectionCallback> query_protection_callbacks_;
   std::queue<EnableProtectionCallback> enable_protection_callbacks_;
 
   // 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_;
 
   // Most-recently-used framebuffer size.
   gfx::Size framebuffer_size_;
 
   base::ObserverList<Observer> observers_;
 
   // The timer to delay configuring displays. This is used to aggregate multiple
@@ skipping 29 matching lines @@
 
   // This must be the last variable.
   base::WeakPtrFactory<DisplayConfigurator> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DisplayConfigurator);
 };
 
 }  // namespace ui
 
 #endif  // UI_DISPLAY_CHROMEOS_DISPLAY_CONFIGURATOR_H_