Reland: ash: reset color management when new screens are hotplugged

ui/ozone/platform/drm/gpu/drm_gpu_display_manager.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_OZONE_PLATFORM_DRM_GPU_DRM_GPU_DISPLAY_MANAGER_H_
 #define UI_OZONE_PLATFORM_DRM_GPU_DRM_GPU_DISPLAY_MANAGER_H_
 
 #include <stdint.h>
 
 #include "base/macros.h"
@@ skipping 26 matching lines @@
   // Takes/releases the control of the DRM devices.
   bool TakeDisplayControl();
   void RelinquishDisplayControl();
 
   bool ConfigureDisplay(int64_t id,
                         const DisplayMode_Params& mode,
                         const gfx::Point& origin);
   bool DisableDisplay(int64_t id);
   bool GetHDCPState(int64_t display_id, HDCPState* state);
   bool SetHDCPState(int64_t display_id, HDCPState state);
-  void SetGammaRamp(int64_t id, const std::vector<GammaRampRGBEntry>& lut);
   void SetColorCorrection(int64_t id,
                           const std::vector<GammaRampRGBEntry>& degamma_lut,
                           const std::vector<GammaRampRGBEntry>& gamma_lut,
                           const std::vector<float>& correction_matrix);
 
  private:
   DrmDisplay* FindDisplay(int64_t display_id);
 
   // Notify ScreenManager of all the displays that were present before the
   // update but are gone after the update.
   void NotifyScreenManager(
       const std::vector<std::unique_ptr<DrmDisplay>>& new_displays,
       const std::vector<std::unique_ptr<DrmDisplay>>& old_displays) const;
 
   ScreenManager* screen_manager_;  // Not owned.
   DrmDeviceManager* drm_device_manager_;  // Not owned.
 
   std::vector<std::unique_ptr<DrmDisplay>> displays_;
 
   DISALLOW_COPY_AND_ASSIGN(DrmGpuDisplayManager);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRM_GPU_DRM_GPU_DISPLAY_MANAGER_H_