Revert of ash: reset color management when new screens are hotplugged

ui/ozone/platform/drm/gpu/mock_drm_device.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_MOCK_DRM_DEVICE_H_
 #define UI_OZONE_PLATFORM_DRM_GPU_MOCK_DRM_DEVICE_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 91 matching lines @@
                         uint32_t* handle,
                         uint32_t* stride) override;
   bool DestroyDumbBuffer(uint32_t handle) override;
   bool MapDumbBuffer(uint32_t handle, size_t size, void** pixels) override;
   bool UnmapDumbBuffer(void* pixels, size_t size) override;
   bool CloseBufferHandle(uint32_t handle) override;
   bool CommitProperties(drmModeAtomicReq* properties,
                         uint32_t flags,
                         uint32_t crtc_count,
                         const PageFlipCallback& callback) override;
+  bool SetGammaRamp(uint32_t crtc_id,
+                    const std::vector<GammaRampRGBEntry>& lut) override;
   bool SetColorCorrection(uint32_t crtc_id,
                           const std::vector<GammaRampRGBEntry>& degamma_lut,
                           const std::vector<GammaRampRGBEntry>& gamma_lut,
                           const std::vector<float>& correction_matrix) override;
   bool SetCapability(uint64_t capability, uint64_t value) override;
 
  private:
   ~MockDrmDevice() override;
 
   int get_crtc_call_count_;
@@ skipping 20 matching lines @@
   std::map<uint32_t, uint32_t> crtc_cursor_map_;
 
   std::queue<PageFlipCallback> callbacks_;
 
   DISALLOW_COPY_AND_ASSIGN(MockDrmDevice);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRM_GPU_MOCK_DRM_DEVICE_H_