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

ui/ozone/platform/drm/test/mock_drm_device.h

Index: ui/ozone/platform/drm/test/mock_drm_device.h
diff --git a/ui/ozone/platform/drm/test/mock_drm_device.h b/ui/ozone/platform/drm/test/mock_drm_device.h
index 5632b6e2043febaa94c3334316c08cb85664ffc6..cd9a2f225cf621a85f980b94a5866ff0872779c9 100644
--- a/ui/ozone/platform/drm/test/mock_drm_device.h
+++ b/ui/ozone/platform/drm/test/mock_drm_device.h
@@ -16,6 +16,7 @@
 namespace ui {
 
 class CrtcController;
+struct GammaRampRGBEntry;
 
 // The real DrmDevice makes actual DRM calls which we can't use in unit tests.
 class MockDrmDevice : public ui::DrmDevice {
@@ -108,6 +109,8 @@ class MockDrmDevice : public ui::DrmDevice {
   bool CommitProperties(drmModePropertySet* properties,
                         uint32_t flags,
                         const PageFlipCallback& callback) override;
+  bool SetGammaRamp(uint32_t crtc_id,
+                    const std::vector<GammaRampRGBEntry>& lut) override;
 
  private:
   ~MockDrmDevice() override;