exo: Add support for linux_dmabuf interface to wayland bindings.

components/exo/wayland/BUILD.gn

 # Copyright 2015 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.
 
 import("//build/config/linux/pkg_config.gni")
 import("//build/config/ui.gni")
 
 if (use_xkbcommon) {
   pkg_config("xkbcommon") {
     packages = [ "xkbcommon" ]
   }
 }
 
+if (use_ozone) {
+  pkg_config("libdrm") {
+    packages = [ "libdrm" ]
+  }
+}
+
 source_set("wayland") {
   sources = [
     "scoped_wl.cc",
     "scoped_wl.h",
     "server.cc",
     "server.h",
   ]
 
   defines = [ "EXO_IMPLEMENTATION" ]
 
   deps = [
     "//ash",
     "//base",
     "//components/exo",
     "//ipc:ipc",
     "//skia",
     "//third_party/wayland:wayland_server",
     "//third_party/wayland-protocols:scaler_protocol",
     "//third_party/wayland-protocols:xdg_shell_protocol",
     "//ui/events:dom_keycode_converter",
     "//ui/events:events_base",
   ]
 
   if (use_ozone) {
-    deps += [ "//third_party/mesa:wayland_drm_protocol" ]
+    deps += [
+      "//third_party/mesa:wayland_drm_protocol",
+      "//third_party/wayland-protocols:linux_dmabuf_protocol",
+    ]
+    configs += [ ":libdrm" ]
   }
 
   if (use_xkbcommon) {
     configs += [ ":xkbcommon" ]
-
     defines += [ "USE_XKBCOMMON" ]
   }
 }
 
 source_set("unit_tests") {
   testonly = true
 
   sources = [
     "server_unittest.cc",
   ]
 
   deps = [
     ":wayland",
     "//base",
     "//components/exo",
     "//testing/gtest",
     "//third_party/wayland:wayland_client",
   ]
 }