exo: Add support for wl_drm version 2 to wayland bindings.

components/exo/wayland/BUILD.gn

Index: components/exo/wayland/BUILD.gn
diff --git a/components/exo/wayland/BUILD.gn b/components/exo/wayland/BUILD.gn
index 2041108cb1d2cd5d61af55867f7ea3fb3e38785f..67d6d63db713f4f0a002f5c222263d48e693a857 100644
--- a/components/exo/wayland/BUILD.gn
+++ b/components/exo/wayland/BUILD.gn
@@ -2,6 +2,8 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//build/config/ui.gni")
+
 source_set("wayland") {
   sources = [
     "scoped_wl_types.cc",
@@ -18,6 +20,10 @@ source_set("wayland") {
     "//skia",
     "//third_party/wayland:wayland_server",
   ]
+
+  if (use_ozone) {
+    deps += [ "//third_party/mesa:wayland_drm_protocol" ]
+  }
 }
 
 source_set("unit_tests") {
@@ -28,8 +34,8 @@ source_set("unit_tests") {
   ]
 
   deps = [
+    ":wayland",
     "//testing/gtest",
     "//third_party/wayland:wayland_client",
-    ":wayland",
   ]
 }