Stop using SpawnedTestServer in DownloadContentTest.*

content/content_tests.gypi

 # Copyright (c) 2013 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.
 
 {
   'variables': {
     'layouttest_support_content_sources': [
       'public/test/layouttest_support.h',
       'public/test/nested_message_pump_android.cc',
       'public/test/nested_message_pump_android.h',
@@ skipping 57 matching lines @@
       'public/test/sandbox_file_system_test_helper.cc',
       'public/test/sandbox_file_system_test_helper.h',
       'public/test/test_browser_context.cc',
       'public/test/test_browser_context.h',
       'public/test/test_browser_thread.cc',
       'public/test/test_browser_thread.h',
       'public/test/test_browser_thread_bundle.cc',
       'public/test/test_browser_thread_bundle.h',
       'public/test/test_content_client_initializer.cc',
       'public/test/test_content_client_initializer.h',
+      'public/test/test_download_request_handler.cc',
+      'public/test/test_download_request_handler.h',
       'public/test/test_file_error_injector.cc',
       'public/test/test_file_error_injector.h',
       'public/test/test_file_system_backend.cc',
       'public/test/test_file_system_backend.h',
       'public/test/test_file_system_context.cc',
       'public/test/test_file_system_context.h',
       'public/test/test_file_system_options.cc',
       'public/test/test_file_system_options.h',
       'public/test/test_launcher.cc',
       'public/test/test_launcher.h',
@@ skipping 2110 matching lines @@
                   'content_unittests_apk.isolate',
                 ],
               },
             ],
           },
         ],
       ],
     }],
   ],
 }