Add chrome/browser/apps/BUILD.gn and move Chrome-specific code there

apps/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/features.gni")
 import("//build/config/ui.gni")
 import("//extensions/features/features.gni")
 
 assert(!is_android && !is_ios)
 
 static_library("apps") {
   sources = []
 
   if (enable_extensions) {
     sources += [
       "app_lifetime_monitor.cc",
       "app_lifetime_monitor.h",
       "app_lifetime_monitor_factory.cc",
       "app_lifetime_monitor_factory.h",
-      "app_load_service.cc",
-      "app_load_service.h",
-      "app_load_service_factory.cc",
-      "app_load_service_factory.h",
       "app_restore_service.cc",
       "app_restore_service.h",
       "app_restore_service_factory.cc",
       "app_restore_service_factory.h",
       "browser_context_keyed_service_factories.cc",
       "browser_context_keyed_service_factories.h",
       "launcher.cc",
       "launcher.h",
       "metrics_names.h",
       "saved_files_service.cc",
       "saved_files_service.h",
       "saved_files_service_factory.cc",
       "saved_files_service_factory.h",
       "switches.cc",
       "switches.h",
     ]
 
     configs += [ "//build/config/compiler:wexit_time_destructors" ]
 
     deps = [
       "//chrome/app/theme:theme_resources",
-      "//chrome/browser/extensions",
-      "//chrome/common/extensions/api",
-      "//components/web_modal",
+      "//components/keyed_service/content",
+      "//content/public/browser",
+      "//content/public/common",
+      "//extensions/common",
+      "//extensions/common/api",
       "//skia",
     ]
 
-    # TODO: This top level directory should not have an include cycle.
-    allow_circular_includes_from = [ "//chrome/browser/extensions" ]
+    if (is_chromeos) {
+      deps += [ "//components/user_manager" ]
+    }
   }
 
   if (toolkit_views) {
     sources += [
       "ui/views/app_window_frame_view.cc",
       "ui/views/app_window_frame_view.h",
     ]
     deps += [
+      "//cc/paint",
       "//ui/strings",
       "//ui/views",
     ]
     if (enable_extensions) {
       deps += [ "//extensions/browser" ]
     }
   }
 
   # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
   configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 }
 
 static_library("test_support") {
   testonly = true
   sources = [
     "test/app_window_waiter.cc",
     "test/app_window_waiter.h",
   ]
 
   public_deps = [
     "//content/public/browser",
   ]
 }