Make management.launchApp() work for hosted apps on Athena

chrome/browser/ui/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/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 
 gypi_values = exec_script(
     "//build/gypi_to_gn.py",
@@ skipping 182 matching lines @@
     sources += rebase_path(gypi_values.chrome_browser_ui_non_ash_sources,
                            ".", "//chrome")
   }
   if (use_athena) {
     sources += rebase_path(gypi_values.chrome_browser_ui_athena_sources,
                            ".", "//chrome")
   } else {  # Not athena.
     if (!is_android) {
       sources += rebase_path(
           gypi_values.chrome_browser_ui_non_athena_non_android_sources,
-          ".", "//chrome")   
+          ".", "//chrome")
     }
     if (use_ash) {
       sources += rebase_path(
           gypi_values.chrome_browser_ui_ash_non_athena_sources,
           ".", "//chrome")
     }
   }
   if (toolkit_views) {
     sources += rebase_path(gypi_values.chrome_browser_ui_views_sources,
                            ".", "//chrome")
@@ skipping 259 matching lines @@
     "//chrome/browser",
     "//content/public/browser",
     "//content/public/common",
     "//content/test:test_support",
     "//net:test_support",
     "//skia",
     "//testing/gtest",
     "//ui/base",
   ]
 }