[1/2][Ozone-Drm] Refactor GPU display management

ui/ozone/platform/drm/gpu/drm_gpu_display_manager.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_DRM_GPU_DISPLAY_MANAGER_H_
 #define UI_OZONE_PLATFORM_DRM_GPU_DRM_GPU_DISPLAY_MANAGER_H_
 
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "ui/ozone/common/gpu/ozone_gpu_message_params.h"
 
-namespace base {
-class FilePath;
-class SingleThreadTaskRunner;
-struct FileDescriptor;
-}
-
 namespace ui {
 
-class DeviceManager;
-class DisplayMode;
-class DrmDevice;
 class DrmDeviceManager;
-class DrmDisplaySnapshot;
-class DrmDisplayMode;
+class DrmDisplay;
 class ScreenManager;
 
 struct GammaRampRGBEntry;
 
 class DrmGpuDisplayManager {
  public:
   DrmGpuDisplayManager(ScreenManager* screen_manager,
                        DrmDeviceManager* drm_device_manager);
   ~DrmGpuDisplayManager();
 
-  void InitializeIOTaskRunner(
-      const scoped_refptr<base::SingleThreadTaskRunner>& task_runner);
-
   // Returns a list of the connected displays. When this is called the list of
   // displays is refreshed.
   std::vector<DisplaySnapshot_Params> GetDisplays();
 
+  // Takes/releases the control of the DRM devices.
+  bool TakeDisplayControl();
+  bool RelinquishDisplayControl();
+
   bool ConfigureDisplay(int64_t id,
                         const DisplayMode_Params& mode,
                         const gfx::Point& origin);
   bool DisableDisplay(int64_t id);
-
-  // Takes/releases the control of the DRM devices.
-  bool TakeDisplayControl();
-  bool RelinquishDisplayControl();
-
-  // Called on DRM hotplug events to add/remove a DRM device.
-  void AddGraphicsDevice(const base::FilePath& path,
-                         const base::FileDescriptor& fd);
-  void RemoveGraphicsDevice(const base::FilePath& path);
-
   bool GetHDCPState(int64_t display_id, HDCPState* state);
   bool SetHDCPState(int64_t display_id, HDCPState state);
-
-  // Set the gamma ramp for a particular display id.
   void SetGammaRamp(int64_t id, const std::vector<GammaRampRGBEntry>& lut);
 
  private:
-  DrmDisplaySnapshot* FindDisplaySnapshot(int64_t id);
-  const DrmDisplayMode* FindDisplayMode(const gfx::Size& size,
-                                        bool is_interlaced,
-                                        float refresh_rate);
-
-  void RefreshDisplayList();
-  bool Configure(const DrmDisplaySnapshot& output,
-                 const DrmDisplayMode* mode,
-                 const gfx::Point& origin);
+  DrmDisplay* FindDisplay(int64_t display_id);
 
   // Notify ScreenManager of all the displays that were present before the
   // update but are gone after the update.
-  void NotifyScreenManager(
-      const std::vector<DrmDisplaySnapshot*>& new_displays,
-      const std::vector<DrmDisplaySnapshot*>& old_displays) const;
+  void NotifyScreenManager(const std::vector<DrmDisplay*>& new_displays,
+                           const std::vector<DrmDisplay*>& old_displays) const;
 
   ScreenManager* screen_manager_;  // Not owned.
   DrmDeviceManager* drm_device_manager_;  // Not owned.
-  scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
-  std::vector<scoped_refptr<DrmDevice>> devices_;
-  // Modes can be shared between different displays, so we need to keep track
-  // of them independently for cleanup.
-  ScopedVector<const DisplayMode> cached_modes_;
-  ScopedVector<DrmDisplaySnapshot> cached_displays_;
+
+  ScopedVector<DrmDisplay> displays_;
 
   DISALLOW_COPY_AND_ASSIGN(DrmGpuDisplayManager);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRM_GPU_DRM_GPU_DISPLAY_MANAGER_H_