Move chrome.downloads out of experimental to dev

chrome/chrome_tests.gypi

 # Copyright (c) 2012 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' : {
     'pyautolib_sources': [
       'app/chrome_command_ids.h',
       'app/chrome_dll_resource.h',
       'common/automation_constants.h',
       'common/pref_names.cc',
@@ skipping 2672 matching lines @@
         'browser/chromeos/oom_priority_manager_browsertest.cc',
         'browser/chromeos/process_proxy/process_proxy_browsertest.cc',
         'browser/chromeos/ui/idle_logout_dialog_view_browsertest.cc',
         'browser/collected_cookies_browsertest.cc',
         'browser/content_settings/content_settings_browsertest.cc',
         'browser/crash_recovery_browsertest.cc',
         'browser/custom_handlers/protocol_handler_registry_browsertest.cc',
         'browser/debugger/devtools_sanity_browsertest.cc',
         'browser/download/download_browsertest.cc',
         'browser/download/download_danger_prompt_browsertest.cc',
-        'browser/download/download_extension_apitest.cc',
-        'browser/download/download_extension_test.cc',
+        'browser/extensions/api/downloads/downloads_apitest.cc',
+        'browser/extensions/api/downloads/downloads_api_unittest.cc',
         'browser/download/download_query_unittest.cc',
         'browser/download/download_test_observer.cc',
         'browser/download/save_page_browsertest.cc',
         'browser/errorpage_browsertest.cc',
         'browser/extensions/alert_apitest.cc',
         'browser/extensions/all_urls_apitest.cc',
         'browser/extensions/api/app/app_apitest.cc',
         'browser/extensions/api/bluetooth/bluetooth_apitest_chromeos.cc',
         'browser/extensions/api/browsing_data/browsing_data_test.cc',
         'browser/extensions/api/cookies/cookies_apitest.cc',
@@ skipping 1980 matching lines @@
               # Use outputs of this action as inputs for the main target build.
               # Seems as a misnomer but makes this happy on Linux (scons).
               'process_outputs_as_sources': 1,
             },
           ],  # 'actions'
         },
       ]
     }],  # 'coverage!=0'
   ],  # 'conditions'
 }