ozone: ClientPixmapManager passes VGEM fd from browser to renderer.

ui/ozone/platform/drm/ozone_platform_drm.cc

Index: ui/ozone/platform/drm/ozone_platform_drm.cc
diff --git a/ui/ozone/platform/drm/ozone_platform_drm.cc b/ui/ozone/platform/drm/ozone_platform_drm.cc
index 0d40c719b4f44861e4d0da4501b382e309608665..6417e10ef772e9f7b20c92549bd46f9a48e619fd 100644
--- a/ui/ozone/platform/drm/ozone_platform_drm.cc
+++ b/ui/ozone/platform/drm/ozone_platform_drm.cc
@@ -5,6 +5,7 @@
 #include "ui/ozone/platform/drm/ozone_platform_drm.h"
 
 #include "base/at_exit.h"
+#include "base/file_descriptor_posix.h"
 #include "base/thread_task_runner_handle.h"
 #include "ui/base/cursor/ozone/bitmap_cursor_factory_ozone.h"
 #include "ui/events/ozone/device/device_manager.h"
@@ -90,6 +91,9 @@ class OzonePlatformDrm : public OzonePlatform {
     return make_scoped_ptr(
         new DrmNativeDisplayDelegate(display_manager_.get()));
   }
+  base::FileDescriptor GetVirtualDeviceFd() override {
+    return base::FileDescriptor();
+  }
   void InitializeUI() override {
     drm_device_manager_.reset(new DrmDeviceManager(
         scoped_ptr<DrmDeviceGenerator>(new DrmDeviceGenerator())));