Revert of Move content's shell connections to the IO thread

content/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("//build/config/ui.gni")
 import("//media/media_options.gni")
 
 # See //content/BUILD.gn for how this works.
 group("gpu") {
   visibility = [ "//content/*" ]  # This is an internal content API.
@@ skipping 39 matching lines @@
     "//content/child",
     "//content/common",
     "//content/public/child:child_sources",
     "//content/public/common:common_sources",
     "//gpu:gpu",
     "//gpu/ipc/common:command_buffer_traits",
     "//gpu/ipc/service",
     "//ipc",
     "//media/gpu",
     "//media/gpu/ipc/service",
-    "//services/shell/public/cpp",
     "//services/shell/public/interfaces",
     "//skia",
     "//ui/events/ipc",
     "//ui/gfx/ipc",
     "//ui/gl",
     "//ui/gl/init",
   ]
 
   if (is_android) {
     deps += [ "//media/base/android" ]
@@ skipping 25 matching lines @@
   }
 
   if (use_ozone) {
     deps += [ "//ui/ozone" ]
   }
 
   if (enable_vulkan) {
     deps += [ "//gpu/vulkan" ]
   }
 }