Adds ability to specify how aura::Env is created in content

content/public/app/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.
 
 # App different than the regular content subcomponents (see comments in
 # //content/BUILD.gn) because it has to support the browser/child process split
 # (the "both" target include both browser and child process files and is used
 # for testing).
 #
 # In non-component mode, browser, child, and both all follow the same structure:
 # foo ->
 #   //content/public/app:child (group) ->
 #     //content/public/app:child_sources (source set) ->
 #       //content/app:child (source set)
 
 # In component mode, content is linked as one big turd so there is only one
 # app target containing sources ("both") and the other ones forward to it:
 # foo ->
 #   //content/public/app:child (group; "browser" and "both" ones look the same)
 #     //content (shared library) ->
 #       //content/public/app:both_sources (source set)
 
 import("//build/config/chrome_build.gni")
+import("//build/config/ui.gni")
 import("//services/service_manager/public/service_manifest.gni")
 
 public_app_shared_sources = [
   "content_jni_onload.h",
   "content_main.h",
   "content_main_delegate.cc",
   "content_main_delegate.h",
   "content_main_runner.h",
   "sandbox_helper_win.h",
 ]
 
 public_app_shared_deps = [
   "//base",
   "//base:i18n",
   "//content:export",
   "//content/public/common:common_sources",
   "//content/public/gpu:gpu_sources",
   "//content/public/renderer:renderer_sources",
   "//content/public/utility:utility_sources",
 ]
 
+if (use_aura) {
+  public_app_shared_deps += [ "//ui/aura" ]
+}
+
 if (is_component_build) {
   source_set("both_sources") {
     # Only the main content shared library can pull this in.
     visibility = [ "//content:content" ]
 
     sources = public_app_shared_sources
 
     configs += [ "//content:content_implementation" ]
 
     deps = public_app_shared_deps + [
@@ skipping 138 matching lines @@
 
 service_manifest("renderer_manifest") {
   name = "content_renderer"
   source = "mojo/content_renderer_manifest.json"
 }
 
 service_manifest("utility_manifest") {
   name = "content_utility"
   source = "mojo/content_utility_manifest.json"
 }