[2/4]Allow hotplugging of primary DRM device

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 DrmDeviceGenerator;
+class DrmDeviceManager;
 class DrmDisplaySnapshot;
 class DrmDisplayMode;
 class ScreenManager;
 
 class DrmGpuDisplayManager {
  public:
   DrmGpuDisplayManager(ScreenManager* screen_manager,
-                       const scoped_refptr<DrmDevice>& primary_device,
-                       scoped_ptr<DrmDeviceGenerator> device_generator);
+                       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();
 
   bool ConfigureDisplay(int64_t id,
@@ skipping 24 matching lines @@
                  const DrmDisplayMode* mode,
                  const gfx::Point& origin);
 
   // 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;
 
   ScreenManager* screen_manager_;  // Not owned.
-  scoped_ptr<DrmDeviceGenerator> drm_device_generator_;
+  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_;
 
   DISALLOW_COPY_AND_ASSIGN(DrmGpuDisplayManager);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRM_GPU_DRM_GPU_DISPLAY_MANAGER_H_