Modify build_gles2_cmd_buffer.py to generate a class that implements gpu::GLES2Interace and for eac…

mojo/gpu/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.
+
+source_set("mojo_gles2_implementation") {
+  sources = [
+    "mojo_gles2_impl_autogen.cc",
+    "mojo_gles2_impl_autogen.h",
+  ]
+
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
+  deps = [
+    "//gpu/command_buffer/client:gles2_interface",
+    "//third_party/mojo/src/mojo/public/c/gles2",
+  ]
+}