Add subscribeUniform extension pipeline

gpu/command_buffer/service/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("//build/config/ui.gni")
 import("//third_party/protobuf/proto_library.gni")
 
 source_set("service") {
   sources = [
     "async_pixel_transfer_delegate.cc",
@@ skipping 86 matching lines @@
     "shader_translator_cache.h",
     "shader_translator_cache.cc",
     "stream_texture_manager_in_process_android.h",
     "stream_texture_manager_in_process_android.cc",
     "texture_definition.h",
     "texture_definition.cc",
     "texture_manager.h",
     "texture_manager.cc",
     "transfer_buffer_manager.cc",
     "transfer_buffer_manager.h",
+    "uniform_subscription_manager.h",
+    "uniform_subscription_manager.cc",
     "vertex_array_manager.h",
     "vertex_array_manager.cc",
     "vertex_attrib_manager.h",
     "vertex_attrib_manager.cc",
   ]
 
   defines = [ "GPU_IMPLEMENTATION" ]
 
   configs += [
     "//third_party/khronos:khronos_headers",
@@ skipping 33 matching lines @@
   if (is_android && !is_debug) {
     # On Android optimize more since this component can be a bottleneck.
     configs -= [ "//build/config/compiler:optimize" ]
     configs += [ "//build/config/compiler:optimize_max" ]
   }
 }
 
 proto_library("disk_cache_proto") {
   sources = [ "disk_cache_proto.proto" ]
 }