Ozone support for multiprocess graphics.

ui/ozone/platform/drm/gpu/drm_device.h

Index: ui/ozone/platform/drm/gpu/drm_device.h
diff --git a/ui/ozone/platform/drm/gpu/drm_device.h b/ui/ozone/platform/drm/gpu/drm_device.h
index 012dde70373e9a56a20d9663f77a5aa5a411b05f..21d98d23f388f4ef40011fcbd93a4995f0fbe336 100644
--- a/ui/ozone/platform/drm/gpu/drm_device.h
+++ b/ui/ozone/platform/drm/gpu/drm_device.h
@@ -178,6 +178,12 @@ class OZONE_EXPORT DrmDevice : public base::RefCountedThreadSafe<DrmDevice> {
 
   HardwareDisplayPlaneManager* plane_manager() { return plane_manager_.get(); }
 
+  bool BufferHandleToFd(uint32_t handle, int* fd);
+  bool BufferFdToHandle(int fd, uint32_t* handle);
+  bool BufferHandleSetTiling(uint32_t handle,
+                             uint32_t stride,
+                             uint32_t tiling_mode);
+
  protected:
   friend class base::RefCountedThreadSafe<DrmDevice>;