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

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

Index: ui/ozone/platform/drm/gpu/drm_device.h
diff --git a/ui/ozone/platform/drm/gpu/drm_device.h b/ui/ozone/platform/drm/gpu/drm_device.h
index 1e3d12e6ca9ddbfa946b930b6b5c352c87684066..02d88edfb2f57455acf89bbbda59198ba8cce2f0 100644
--- a/ui/ozone/platform/drm/gpu/drm_device.h
+++ b/ui/ozone/platform/drm/gpu/drm_device.h
@@ -34,6 +34,7 @@ class SingleThreadTaskRunner;
 namespace ui {
 
 class HardwareDisplayPlaneManager;
+struct GammaRampRGBEntry;
 
 // Wraps DRM calls into a nice interface. Used to provide different
 // implementations of the DRM calls. For the actual implementation the DRM API
@@ -160,6 +161,10 @@ class OZONE_EXPORT DrmDevice : public base::RefCountedThreadSafe<DrmDevice> {
                                 uint32_t flags,
                                 const PageFlipCallback& callback);
 
+  // Set the gamma ramp for |crtc_id| to reflect the ramps in |lut|.
+  virtual bool SetGammaRamp(uint32_t crtc_id,
+                            const std::vector<GammaRampRGBEntry>& lut);
+
   // Drm master related
   virtual bool SetMaster();
   virtual bool DropMaster();