Load and apply a vcgt table from an ICC file to the internal display

ui/ozone/platform/drm/gpu/drm_gpu_display_manager.h

Index: ui/ozone/platform/drm/gpu/drm_gpu_display_manager.h
diff --git a/ui/ozone/platform/drm/gpu/drm_gpu_display_manager.h b/ui/ozone/platform/drm/gpu/drm_gpu_display_manager.h
index bbfa50834d5bf3b5dd8ddcfe59d61ba626d7dc2b..010e5d3c5e689ee4e2f7cc3ac5841476588dd00d 100644
--- a/ui/ozone/platform/drm/gpu/drm_gpu_display_manager.h
+++ b/ui/ozone/platform/drm/gpu/drm_gpu_display_manager.h
@@ -26,6 +26,8 @@ class DrmDisplaySnapshot;
 class DrmDisplayMode;
 class ScreenManager;
 
+struct GammaRampRGBEntry;
+
 class DrmGpuDisplayManager {
  public:
   DrmGpuDisplayManager(ScreenManager* screen_manager,
@@ -54,6 +56,9 @@ class DrmGpuDisplayManager {
                          const base::FileDescriptor& fd);
   void RemoveGraphicsDevice(const base::FilePath& path);
 
+  // Set the gamma ramp for a particular display id.
+  void SetGammaRamp(int64_t id, const std::vector<GammaRampRGBEntry>& lut);
+
  private:
   DrmDisplaySnapshot* FindDisplaySnapshot(int64_t id);
   const DrmDisplayMode* FindDisplayMode(const gfx::Size& size,