drm: GPU process manages VGEM fd.

ui/ozone/platform/drm/gpu/drm_gpu_platform_support.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_PLATFORM_SUPPORT_H_
 #define UI_OZONE_PLATFORM_DRM_GPU_DRM_GPU_PLATFORM_SUPPORT_H_
 
 #include "base/containers/scoped_ptr_hash_map.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
@@ skipping 57 matching lines @@
 
   // Display related IPC handlers.
   void OnRefreshNativeDisplays();
   void OnConfigureNativeDisplay(int64_t id,
                                 const DisplayMode_Params& mode,
                                 const gfx::Point& origin);
   void OnDisableNativeDisplay(int64_t id);
   void OnTakeDisplayControl();
   void OnRelinquishDisplayControl();
   void OnAddGraphicsDevice(const base::FilePath& path,
-                           const base::FileDescriptor& fd);
+                           const base::FileDescriptor& fd,
+                           bool is_vgem);
   void OnRemoveGraphicsDevice(const base::FilePath& path);
   void OnGetHDCPState(int64_t display_id);
   void OnSetHDCPState(int64_t display_id, HDCPState state);
   void OnSetGammaRamp(int64_t id, const std::vector<GammaRampRGBEntry>& lut);
 
   void SetIOTaskRunner(
       const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner);
 
   IPC::Sender* sender_;                   // Not owned.
   DrmDeviceManager* drm_device_manager_;  // Not owned.
   ScreenManager* screen_manager_;         // Not owned.
 
   scoped_ptr<DrmGpuDisplayManager> ndd_;
   ScopedVector<GpuPlatformSupport> handlers_;
   scoped_refptr<IPC::MessageFilter> filter_;
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRM_GPU_DRM_GPU_PLATFORM_SUPPORT_H_