Move download extension api implementation to download/ dir.

chrome/chrome_tests.gypi

 # Copyright (c) 2011 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 2373 matching lines @@
         'browser/chromeos/status/input_method_menu_button_browsertest.cc',
         'browser/chromeos/status/power_menu_button_browsertest.cc',
         'browser/chromeos/status/status_area_view_browsertest.cc',
         'browser/chromeos/setting_level_bubble_browsertest.cc',
         'browser/chromeos/tab_closeable_state_watcher_browsertest.cc',
         'browser/chromeos/volume_bubble_browsertest.cc',
         'browser/content_settings/content_settings_browsertest.cc',
         'browser/crash_recovery_browsertest.cc',
         'browser/custom_handlers/protocol_handler_registry_browsertest.cc',
         'browser/download/download_browsertest.cc',
+        'browser/download/download_extension_apitest.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/app_background_page_apitest.cc',
         'browser/extensions/app_process_apitest.cc',
         'browser/extensions/autoupdate_interceptor.cc',
         'browser/extensions/autoupdate_interceptor.h',
         'browser/extensions/browser_action_apitest.cc',
@@ skipping 22 matching lines @@
         'browser/extensions/extension_clear_apitest.cc',
         'browser/extensions/extension_clipboard_apitest.cc',
         'browser/extensions/extension_content_settings_apitest.cc',
         'browser/extensions/extension_context_menu_apitest.cc',
         'browser/extensions/extension_context_menu_browsertest.cc',
         'browser/extensions/extension_cookies_apitest.cc',
         'browser/extensions/extension_crash_recovery_browsertest.cc',
         'browser/extensions/extension_debugger_apitest.cc',
         'browser/extensions/extension_decode_jpeg_apitest.cc',
         'browser/extensions/extension_dom_clipboard_apitest.cc',
-        'browser/extensions/extension_downloads_apitest.cc',
         'browser/extensions/extension_file_browser_private_apitest.cc',
         'browser/extensions/extension_fileapi_apitest.cc',
         'browser/extensions/extension_function_test_utils.cc',
         'browser/extensions/extension_function_test_utils.h',
         'browser/extensions/extension_geolocation_apitest.cc',
         'browser/extensions/extension_get_views_apitest.cc',
         'browser/extensions/extension_i18n_apitest.cc',
         'browser/extensions/extension_icon_source_apitest.cc',
         'browser/extensions/extension_idle_apitest.cc',
         'browser/extensions/extension_incognito_apitest.cc',
@@ skipping 1736 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'
 }