Implement cc::SurfaceId StructTraits

cc/ipc/BUILD.gn

 # Copyright 2016 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("//mojo/public/tools/bindings/mojom.gni")
+
 component("ipc") {
   output_name = "cc_ipc"
 
   defines = [ "CC_IPC_IMPLEMENTATION" ]
 
   sources = [
     "cc_ipc_export.h",
     "cc_param_traits.cc",
     "cc_param_traits.h",
     "cc_param_traits_macros.h",
   ]
 
   public_deps = [
     "//cc",
     "//cc/surfaces",
   ]
 
   deps = [
     "//base",
     "//gpu/ipc/common",
     "//ipc",
     "//skia",
     "//ui/events/ipc",
     "//ui/gfx",
     "//ui/gfx/ipc",
     "//ui/gfx/ipc/geometry",
     "//ui/gfx/ipc/skia",
   ]
 }
+
+mojom("interfaces") {
+  sources = [
+    "surface_id.mojom",
+  ]
+}