MD Downloads: track downloads in C++, dispatch discrete JS updates

chrome/chrome_tests_unit.gypi

 # Copyright 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': {
     'chrome_unit_tests_sources': [
       # histograms.xml is analyzed by AboutFlagsHistogramTest, so this
       # dependency is needed to make commit bots run unit_tests on
       # histograms.xml changes.
       '../tools/metrics/histograms/histograms.xml',
@@ skipping 1075 matching lines @@
       'browser/media/webrtc_rtp_dump_writer_unittest.cc',
       'renderer/media/chrome_webrtc_log_message_delegate_unittest.cc',
     ],
     'chrome_unit_tests_js_sources': [
       'browser/resources/google_now/background.js',
       'browser/resources/google_now/background_test_util.js',
       'browser/resources/google_now/cards.js',
       'browser/resources/google_now/common_test_util.js',
       'browser/resources/google_now/utility.js',
       'browser/resources/google_now/utility_test_util.js',
+      'browser/resources/md_downloads/action_service.js',
       'browser/resources/print_preview/data/measurement_system.js',
       'browser/resources/print_preview/print_preview_utils.js',
       'renderer/resources/extensions/notifications_custom_bindings.js',
       'renderer/resources/extensions/notifications_test_util.js',
       '../ui/webui/resources/js/cr.js',
     ],
     'chrome_unit_tests_gtestjs_sources': [
       'browser/resources/google_now/background_unittest.gtestjs',
       'browser/resources/google_now/cards_unittest.gtestjs',
       'browser/resources/google_now/utility_unittest.gtestjs',
+      'browser/resources/md_downloads/action_service_unittest.gtestjs',
       'browser/resources/print_preview/data/measurement_system_unittest.gtestjs',
       'browser/resources/print_preview/print_preview_utils_unittest.gtestjs',
       'renderer/resources/extensions/notifications_custom_bindings.gtestjs',
       'test/data/unit/framework_unittest.gtestjs',
     ],
     'chrome_unit_tests_chromeos_sources': [
       # TODO(lukasza): Move Drive tests outside of CrOS (crbug.com/498951).
       '../components/drive/change_list_loader_unittest.cc',
       '../components/drive/change_list_processor_unittest.cc',
       '../components/drive/directory_loader_unittest.cc',
@@ skipping 456 matching lines @@
       'browser/ui/toolbar/test_toolbar_model.cc',
       'browser/ui/toolbar/test_toolbar_model.h',
       'browser/ui/toolbar/toolbar_actions_bar_unittest.cc',
       'browser/ui/toolbar/toolbar_actions_bar_unittest.h',
       'browser/ui/toolbar/toolbar_actions_model_unittest.cc',
       'browser/ui/toolbar/toolbar_model_unittest.cc',
       'browser/ui/website_settings/permission_bubble_manager_unittest.cc',
       'browser/ui/website_settings/permission_menu_model_unittest.cc',
       'browser/ui/webui/downloads_util_unittest.cc',
       'browser/ui/webui/help/version_updater_chromeos_unittest.cc',
+      'browser/ui/webui/md_downloads/downloads_list_tracker_unittest.cc',
       'browser/ui/webui/ntp/ntp_user_data_logger_unittest.cc',
       'browser/ui/webui/options/autofill_options_handler_unittest.cc',
       'browser/ui/webui/options/clear_browser_data_handler_unittest.cc',
       'browser/ui/webui/options/language_options_handler_unittest.cc',
       'browser/ui/webui/options/pepper_flash_content_settings_utils_unittest.cc',
       'browser/ui/webui/options/sync_setup_handler_unittest.cc',
       'browser/ui/webui/settings/sync_handler_unittest.cc',
       'browser/ui/webui/signin/login_ui_service_unittest.cc',
       'browser/ui/webui/web_dialog_web_contents_delegate_unittest.cc',
       'browser/ui/window_sizer/window_sizer_common_unittest.cc',
@@ skipping 1398 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }