Add a WebUIControllerFactory in content and move chrome://webrtc-internals to 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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 1052 matching lines @@
         'browser/media_gallery/win/mtp_device_delegate_impl_win.cc',
         'browser/media_gallery/win/mtp_device_delegate_impl_win.h',
         'browser/media_gallery/win/mtp_device_object_entry.cc',
         'browser/media_gallery/win/mtp_device_object_entry.h',
         'browser/media_gallery/win/mtp_device_object_enumerator.cc',
         'browser/media_gallery/win/mtp_device_object_enumerator.h',
         'browser/media_gallery/win/mtp_device_operations_util.cc',
         'browser/media_gallery/win/mtp_device_operations_util.h',
         'browser/media_gallery/win/recursive_mtp_device_object_enumerator.cc',
         'browser/media_gallery/win/recursive_mtp_device_object_enumerator.h',
-        'browser/media/chrome_webrtc_internals.cc',
-        'browser/media/chrome_webrtc_internals.h',
         'browser/memory_details.cc',
         'browser/memory_details.h',
         'browser/memory_details_android.cc',
         'browser/memory_details_linux.cc',
         'browser/memory_details_mac.cc',
         'browser/memory_details_win.cc',
         'browser/memory_purger.cc',
         'browser/memory_purger.h',
         'browser/metrics/field_trial_synchronizer.cc',
         'browser/metrics/field_trial_synchronizer.h',
@@ skipping 2021 matching lines @@
           'variables': {
             'jni_gen_dir': 'chrome',
           },
           'includes': [ '../build/jni_generator.gypi' ],
         },
       ],
      },
     ],
   ],
 }