Move SearchProvider implementation into Blink and make it a no-op.

chrome/chrome_tests.gypi

 # Copyright 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': {
     'build_angle_deqp_tests%': 0,
     'chrome_browser_extensions_test_support_sources': [
       # A list of sources which is shared between different browser tests.
       'browser/apps/app_browsertest_util.cc',
       'browser/apps/app_browsertest_util.h',
@@ skipping 290 matching lines @@
       'browser/extensions/subscribe_page_action_browsertest.cc',
       'browser/extensions/wake_event_page_apitest.cc',
       'browser/extensions/web_contents_browsertest.cc',
       'browser/extensions/webstore_inline_installer_browsertest.cc',
       'browser/extensions/webstore_installer_browsertest.cc',
       'browser/extensions/webstore_installer_test.cc',
       'browser/extensions/webstore_installer_test.h',
       'browser/extensions/webstore_reinstaller_browsertest.cc',
       'browser/extensions/webstore_startup_installer_browsertest.cc',
       'browser/extensions/window_open_apitest.cc',
-      'browser/external_extension_browsertest.cc',
       'browser/fast_shutdown_browsertest.cc',
       'browser/favicon/content_favicon_driver_browsertest.cc',
       'browser/first_run/first_run_browsertest.cc',
       'browser/first_run/try_chrome_dialog_view_browsertest.cc',
       'browser/geolocation/access_token_store_browsertest.cc',
       'browser/geolocation/geolocation_browsertest.cc',
       'browser/global_keyboard_shortcuts_mac_browsertest.mm',
       'browser/history/history_browsertest.cc',
       'browser/history/redirect_browsertest.cc',
       'browser/iframe_browsertest.cc',
@@ skipping 3273 matching lines @@
             'browser',
           ],
           'sources': [
             'tools/service_discovery_sniffer/service_discovery_sniffer.cc',
             'tools/service_discovery_sniffer/service_discovery_sniffer.h',
           ],
         }]
     }],
   ],  # 'conditions'
 }