Add FakeDisplayDelegate for off device usage.

ui/ozone/platform/drm/host/drm_native_display_delegate.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_HOST_DRM_NATIVE_DISPLAY_DELEGATE_H_
 #define UI_OZONE_PLATFORM_DRM_HOST_DRM_NATIVE_DISPLAY_DELEGATE_H_
 
 #include <stdint.h>
 
 #include "base/macros.h"
@@ skipping 39 matching lines @@
   bool SetColorCalibrationProfile(
       const ui::DisplaySnapshot& output,
       ui::ColorCalibrationProfile new_profile) override;
   bool SetColorCorrection(const ui::DisplaySnapshot& output,
                           const std::vector<GammaRampRGBEntry>& degamma_lut,
                           const std::vector<GammaRampRGBEntry>& gamma_lut,
                           const std::vector<float>& correction_matrix) override;
 
   void AddObserver(NativeDisplayObserver* observer) override;
   void RemoveObserver(NativeDisplayObserver* observer) override;
+  display::FakeDisplayController* GetFakeDisplayController() override;
 
  private:
   DrmDisplayHostManager* display_manager_;  // Not owned.
 
   base::ObserverList<NativeDisplayObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(DrmNativeDisplayDelegate);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRM_HOST_DRM_NATIVE_DISPLAY_DELEGATE_H_