[DevTools] Cleanup DevToolsTarget and DevToolsManagerDelegate after moving to devtools_discovery.

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 60 matching lines @@
       'browser/android/compositor/scene_layer/static_tab_scene_layer.cc',
       'browser/android/compositor/scene_layer/static_tab_scene_layer.h',
       'browser/android/compositor/tab_content_manager.cc',
       'browser/android/compositor/tab_content_manager.h',
       'browser/android/content_view_util.cc',
       'browser/android/content_view_util.h',
       'browser/android/cookies/cookies_fetcher.cc',
       'browser/android/cookies/cookies_fetcher.h',
       'browser/android/dev_tools_discovery_provider_android.cc',
       'browser/android/dev_tools_discovery_provider_android.h',
-      'browser/android/dev_tools_manager_delegate_android.cc',
-      'browser/android/dev_tools_manager_delegate_android.h',
       'browser/android/dev_tools_server.cc',
       'browser/android/dev_tools_server.h',
       'browser/android/dom_distiller/external_feedback_reporter_android.cc',
       'browser/android/dom_distiller/external_feedback_reporter_android.h',
       'browser/android/download/android_download_manager_overwrite_infobar_delegate.cc',
       'browser/android/download/android_download_manager_overwrite_infobar_delegate.h',
       'browser/android/download/chrome_download_delegate.cc',
       'browser/android/download/chrome_download_delegate.h',
       'browser/android/download/chrome_download_manager_overwrite_infobar_delegate.cc',
       'browser/android/download/chrome_download_manager_overwrite_infobar_delegate.h',
@@ skipping 3753 matching lines @@
           'variables': {
             'proto_in_dir': 'browser/sync_file_system/drive_backend',
             'proto_out_dir': 'chrome/browser/sync_file_system/drive_backend',
           },
           'includes': [ '../build/protoc.gypi' ]
         },
       ],
     },],
   ],
 }