drm: GPU process manages VGEM fd.

ui/ozone/common/gpu/ozone_gpu_messages.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.
 
 // Multiply-included message file, hence no include guard here, but see below
 // for a much smaller-than-usual include guard section.
 
 #include <vector>
 
 #include "base/file_descriptor_posix.h"
@@ skipping 81 matching lines @@
 
 // Configure a display with the specified mode at the specified location.
 IPC_MESSAGE_CONTROL3(OzoneGpuMsg_ConfigureNativeDisplay,
                      int64_t,  // display ID
                      ui::DisplayMode_Params,  // display mode
                      gfx::Point)  // origin for the display
 
 IPC_MESSAGE_CONTROL1(OzoneGpuMsg_DisableNativeDisplay,
                      int64_t)  // display ID
 
-IPC_MESSAGE_CONTROL2(OzoneGpuMsg_AddGraphicsDevice,
+IPC_MESSAGE_CONTROL3(OzoneGpuMsg_AddGraphicsDevice,
                      base::FilePath /* device_path */,
-                     base::FileDescriptor /* device_fd */)
+                     base::FileDescriptor /* device_fd */,
+                     bool /* is_vgem */)
 
 IPC_MESSAGE_CONTROL1(OzoneGpuMsg_RemoveGraphicsDevice,
                      base::FilePath /* device_path */)
 
 // Take control of the display
 IPC_MESSAGE_CONTROL0(OzoneGpuMsg_TakeDisplayControl)
 
 // Let other entity control the display
 IPC_MESSAGE_CONTROL0(OzoneGpuMsg_RelinquishDisplayControl)
 
@@ skipping 23 matching lines @@
 // Response for OzoneGpuMsg_GetHDCPState.
 IPC_MESSAGE_CONTROL3(OzoneHostMsg_HDCPStateReceived,
                      int64_t /* display_id */,
                      bool /* success */,
                      ui::HDCPState /* state */)
 
 // Response for OzoneGpuMsg_SetHDCPState.
 IPC_MESSAGE_CONTROL2(OzoneHostMsg_HDCPStateUpdated,
                      int64_t /* display_id */,
                      bool /* success */)