Add support for virtual displays

ui/display/chromeos/update_display_configuration_task.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_UPDATE_DISPLAY_CONFIGURATION_TASK_H_
 #define UI_DISPLAY_CHROMEOS_UPDATE_DISPLAY_CONFIGURATION_TASK_H_
 
 #include <vector>
 
 #include "base/memory/weak_ptr.h"
@@ skipping 17 matching lines @@
   UpdateDisplayConfigurationTask(NativeDisplayDelegate* delegate,
                                  DisplayLayoutManager* layout_manager,
                                  MultipleDisplayState new_display_state,
                                  chromeos::DisplayPowerState new_power_state,
                                  int power_flags,
                                  uint32_t background_color_argb,
                                  bool force_configure,
                                  const ResponseCallback& callback);
   ~UpdateDisplayConfigurationTask();
 
+  // The pointers to the DisplaySnapshots in this vector are owned by
+  // DisplayConfigurator.
+  void set_virtual_display_snapshots(std::vector<DisplaySnapshot*> snapshots) {
+    virtual_display_snapshots_ = snapshots;
+  }
+
   void Run();
 
  private:
   // Callback to NativeDisplayDelegate::GetDisplays().
   void OnDisplaysUpdated(const std::vector<DisplaySnapshot*>& displays);
 
   // Callback to ConfigureDisplaysTask used to process the result of a display
   // configuration run.
   void OnStateEntered(ConfigureDisplaysTask::Status status);
 
@@ skipping 37 matching lines @@
   bool force_configure_;
 
   // Used to signal that the task has finished.
   ResponseCallback callback_;
 
   bool force_dpms_;
 
   // List of updated displays.
   std::vector<DisplaySnapshot*> cached_displays_;
 
+  // Vector of unowned VirtualDisplaySnapshots to be added when doing the task.
+  std::vector<DisplaySnapshot*> virtual_display_snapshots_;
+
   gfx::Size framebuffer_size_;
 
   scoped_ptr<ConfigureDisplaysTask> configure_task_;
 
   base::WeakPtrFactory<UpdateDisplayConfigurationTask> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(UpdateDisplayConfigurationTask);
 };
 
 }  // namespace ui
 
 #endif  // UI_DISPLAY_CHROMEOS_UPDATE_DISPLAY_CONFIGURATION_TASK_H_