NotForReview: Implement zero/one-copy texture for ozone freon using Intel DRM

ui/ozone/platform/drm/host/drm_display_host_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_HOST_DRM_DISPLAY_HOST_MANAGER_H_
 #define UI_OZONE_PLATFORM_DRM_HOST_DRM_DISPLAY_HOST_MANAGER_H_
 
 #include <queue>
 #include <set>
 
@@ skipping 114 matching lines @@
 
   // True if a display event is currently being processed on a worker thread.
   bool task_pending_ = false;
 
   // Keeps track of all the active DRM devices.
   std::set<base::FilePath> drm_devices_;
 
   // This is used to cache the primary DRM device until the channel is
   // established.
   scoped_ptr<DrmDeviceHandle> primary_drm_device_handle_;
+  base::ScopedFD primary_render_node_file_;
 
   // Manages the VGEM device by itself and doesn't send it to GPU process.
   base::ScopedFD vgem_card_device_file_;
 
   base::WeakPtrFactory<DrmDisplayHostManager> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DrmDisplayHostManager);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRM_HOST_DRM_DISPLAY_HOST_MANAGER_H_