Make mojo/services pass in "gn check"

mojo/services/gles2/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_gles2_service
 source_set("gles2") {
+  public_deps = [
+    ":bindings",
+  ]
   deps = [
-    ":bindings",
     "//base",
     "//gpu/command_buffer/service",
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//ui/gl",
   ]
 
   sources = [
     "command_buffer_impl.cc",
     "command_buffer_impl.h",
   ]
 }
 
 # GYP version: mojo/mojo_services.gypi:mojo_gles2_bindings
 mojom("interfaces") {
   sources = [
     "command_buffer.mojom",
   ]
 }
 
 # GYP version: mojo/mojo_services.gypi:mojo_gles2_bindings
 source_set("bindings") {
   sources = [
     "command_buffer_type_conversions.cc",
     "command_buffer_type_conversions.h",
     "mojo_buffer_backing.cc",
     "mojo_buffer_backing.h",
   ]
 
+  public_deps = [
+    ":interfaces",
+  ]
   deps = [
-    ":interfaces",
+    "//base",
     "//gpu/command_buffer/common",
+    "//mojo/public/cpp/bindings",
+    "//mojo/services/gles2:interfaces",
   ]
 }