Add FakeDisplayDelegate for off device usage.

ui/display/types/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_DISPLAY_TYPES_NATIVE_DISPLAY_DELEGATE_H_
 #define UI_DISPLAY_TYPES_NATIVE_DISPLAY_DELEGATE_H_
 
 #include <stdint.h>
 
 #include <vector>
 
 #include "base/callback.h"
 #include "ui/display/types/display_constants.h"
 #include "ui/display/types/display_types_export.h"
+#include "ui/display/types/fake_display_controller.h"
 
 namespace gfx {
 class Point;
 class Size;
 }
 
 namespace ui {
 class DisplayMode;
 class DisplaySnapshot;
-
 class NativeDisplayObserver;
 
 struct GammaRampRGBEntry;
 
-typedef base::Callback<void(const std::vector<ui::DisplaySnapshot*>&)>
-    GetDisplaysCallback;
-typedef base::Callback<void(bool)> ConfigureCallback;
-typedef base::Callback<void(bool, ui::HDCPState)> GetHDCPStateCallback;
-typedef base::Callback<void(bool)> SetHDCPStateCallback;
-typedef base::Callback<void(bool)> DisplayControlCallback;
+using GetDisplaysCallback =
+    base::Callback<void(const std::vector<ui::DisplaySnapshot*>&)>;
+using ConfigureCallback = base::Callback<void(bool)>;
+using GetHDCPStateCallback = base::Callback<void(bool, ui::HDCPState)>;
+using SetHDCPStateCallback = base::Callback<void(bool)>;
+using DisplayControlCallback = base::Callback<void(bool)>;
 
 // Interface for classes that perform display configuration actions on behalf
 // of DisplayConfigurator.
 // Implementations may perform calls asynchronously. In the case of functions
 // taking callbacks, the callbacks may be called asynchronously when the results
 // are available. The implementations must provide a strong guarantee that the
 // callbacks are always called.
 class DISPLAY_TYPES_EXPORT NativeDisplayDelegate {
  public:
-  virtual ~NativeDisplayDelegate() {}
+  virtual ~NativeDisplayDelegate();
 
   virtual void Initialize() = 0;
 
   // Grabs and refreshes any display server related resources. Must be balanced
   // by a call to UngrabServer().
   virtual void GrabServer() = 0;
 
   // Released the display server and any resources allocated by GrabServer().
   virtual void UngrabServer() = 0;
 
@@ skipping 55 matching lines @@
   // Set the gamma tables and corection matrix for the display.
   virtual bool SetColorCorrection(
       const ui::DisplaySnapshot& output,
       const std::vector<GammaRampRGBEntry>& degamma_lut,
       const std::vector<GammaRampRGBEntry>& gamma_lut,
       const std::vector<float>& correction_matrix) = 0;
 
   virtual void AddObserver(NativeDisplayObserver* observer) = 0;
 
   virtual void RemoveObserver(NativeDisplayObserver* observer) = 0;
+
+  // Returns a fake display controller that can modify the fake display state.
+  // Will return null if not needed, most likely because the delegate is
+  // intended for use on device and doesn't need to fake the display state.
+  virtual display::FakeDisplayController* GetFakeDisplayController() = 0;
 };
 
 }  // namespace ui
 
 #endif  // UI_DISPLAY_TYPES_NATIVE_DISPLAY_DELEGATE_H_