Mojo multiple command buffer support and sample

mojo/services/public/interfaces/gpu/BUILD.gn

 # Copyright 2014 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")
 
-# GYP version: mojo/mojo_services.gypi:mojo_input_events_bindings
-mojom("input_events") {
+# GYP version: mojo/mojo_services.gypi:mojo_gpu_bindings
+mojom("gpu") {
   sources = [
-    "input_events.mojom",
+    "gpu.mojom",
   ]
 
   deps = [
+    "//mojo/services/gles2:bindings",
     "//mojo/services/public/interfaces/geometry",
   ]
 }