DevTools: remove devtools_discovery (merged into content).

chrome/chrome_browser.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': {
     # All .cc, .h, .m, and .mm files under browser except for:
     # * tests and mocks.
     # * code below browser/chromeos
     # * code below browser/extensions
@@ skipping 3387 matching lines @@
             '../cc/cc.gyp:cc',
             '../components/components.gyp:about_handler',
             '../components/components.gyp:autofill_content_browser',
             '../components/components.gyp:browsing_data_content',
             '../components/components.gyp:certificate_reporting',
             '../components/components.gyp:certificate_transparency',
             '../components/components.gyp:contextual_search_browser',
             '../components/components.gyp:cookie_config',
             '../components/components.gyp:data_reduction_proxy_content_browser',
             '../components/components.gyp:data_use_measurement_content',
-            '../components/components.gyp:devtools_discovery',
             '../components/components.gyp:devtools_http_handler',
             '../components/components.gyp:dom_distiller_content_browser',
             '../components/components.gyp:domain_reliability',
             '../components/components.gyp:error_page_common',
             '../components/components.gyp:favicon_content',
             '../components/components.gyp:flags_ui',
             '../components/components.gyp:guest_view_browser',
             '../components/components.gyp:history_content_browser',
             '../components/components.gyp:image_fetcher',
             '../components/components.gyp:keyed_service_content',
@@ skipping 914 matching lines @@
             '../components/components.gyp:rlz',
             '../components/components.gyp:search_engines',
             '../rlz/rlz.gyp:rlz_lib',
             'common',
           ],
         },
       ],
     }],
   ],
 }