GpuInfo mojom struct and struct traits and unit test

gpu/ipc/common/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("//build/config/ui.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
 
 group("common") {
   if (is_component_build) {
     public_deps = [
@@ skipping 112 matching lines @@
     "capabilities.mojom",
     "command_buffer.mojom",
     "dx_diag_node.mojom",
     "gpu_info.mojom",
     "mailbox.mojom",
     "mailbox_holder.mojom",
     "sync_token.mojom",
   ]
 
   public_deps = [
+    "//mojo/common:common_custom_types",
     "//ui/gfx/geometry/mojo",
   ]
 }
 
 mojom("test_interfaces") {
   testonly = true
   sources = [
     "traits_test_service.mojom",
   ]
 
   public_deps = [
     ":interfaces",
   ]
 }