Add FakeDisplayDelegate for off device usage.

ui/display/chromeos/x11/native_display_delegate_x11.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_DISPLAY_CHROMEOS_X11_NATIVE_DISPLAY_DELEGATE_X11_H_
 #define UI_DISPLAY_CHROMEOS_X11_NATIVE_DISPLAY_DELEGATE_X11_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 85 matching lines @@
   std::vector<ColorCalibrationProfile> GetAvailableColorCalibrationProfiles(
       const DisplaySnapshot& output) override;
   bool SetColorCalibrationProfile(const DisplaySnapshot& output,
                                   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:
   class HelperDelegateX11;
 
   // Parses all the modes made available by |screen_|.
   void InitModes();
 
   // Helper method for GetOutputs() that returns an OutputSnapshot struct based
   // on the passed-in information.
   DisplaySnapshotX11* InitDisplaySnapshot(RROutput id,
@@ skipping 54 matching lines @@
 
   // A background color used during boot time + multi displays.
   uint32_t background_color_argb_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeDisplayDelegateX11);
 };
 
 }  // namespace ui
 
 #endif  // UI_DISPLAY_CHROMEOS_X11_NATIVE_DISPLAY_DELEGATE_X11_H_