DevTools: remove support for legacy remote debugger

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.
 {
   'target_defaults': {
     'conditions': [
       ['strip_tests==1', {
         'cflags!': [ '-g' ],
         'ldflags': [ '-Wl,--strip-debug' ],
       }],
@@ skipping 1325 matching lines @@
         'browser/content_settings/content_settings_provider_unittest.cc',
         'browser/content_settings/content_settings_rule_unittest.cc',
         'browser/content_settings/content_settings_utils_unittest.cc',
         'browser/content_settings/cookie_settings_unittest.cc',
         'browser/content_settings/host_content_settings_map_unittest.cc',
         'browser/content_settings/mock_settings_observer.cc',
         'browser/content_settings/mock_settings_observer.h',
         'browser/content_settings/tab_specific_content_settings_unittest.cc',
         'browser/cookies_tree_model_unittest.cc',
         'browser/custom_handlers/protocol_handler_registry_unittest.cc',
-        'browser/debugger/devtools_remote_listen_socket_unittest.cc',
-        'browser/debugger/devtools_remote_listen_socket_unittest.h',
-        'browser/debugger/devtools_remote_message_unittest.cc',
         'browser/diagnostics/diagnostics_model_unittest.cc',
         'browser/download/download_item_unittest.cc',
         'browser/download/download_manager_unittest.cc',
         'browser/download/download_request_infobar_delegate_unittest.cc',
         'browser/download/download_request_limiter_unittest.cc',
         'browser/enumerate_modules_model_unittest_win.cc',
         'browser/event_disposition.cc',
         'browser/event_disposition.h',
         'browser/extensions/app_notification_manager_sync_unittest.cc',
         'browser/extensions/app_notification_manager_unittest.cc',
@@ skipping 2981 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'
 }