Revert 180055: Very likely caused http://crbug.com/173885

chrome/chrome_browser_ui.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_ui',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 2121 matching lines @@
         'browser/ui/webui/tab_modal_confirm_dialog_webui.cc',
         'browser/ui/webui/tab_modal_confirm_dialog_webui.h',
         'browser/ui/webui/task_manager/task_manager_dialog.cc',
         'browser/ui/webui/task_manager/task_manager_dialog.h',
         'browser/ui/webui/task_manager/task_manager_handler.cc',
         'browser/ui/webui/task_manager/task_manager_handler.h',
         'browser/ui/webui/task_manager/task_manager_ui.cc',
         'browser/ui/webui/task_manager/task_manager_ui.h',
         'browser/ui/webui/theme_source.cc',
         'browser/ui/webui/theme_source.h',
+        'browser/ui/webui/tracing_ui.cc',
+        'browser/ui/webui/tracing_ui.h',
         'browser/ui/webui/uber/uber_ui.cc',
         'browser/ui/webui/uber/uber_ui.h',
         'browser/ui/webui/user_actions/user_actions_ui.cc',
         'browser/ui/webui/user_actions/user_actions_ui.h',
         'browser/ui/webui/user_actions/user_actions_ui_handler.cc',
         'browser/ui/webui/user_actions/user_actions_ui_handler.h',
         'browser/ui/webui/version_handler.cc',
         'browser/ui/webui/version_handler.h',
         'browser/ui/webui/version_handler_chromeos.cc',
         'browser/ui/webui/version_handler_chromeos.h',
@@ skipping 438 matching lines @@
             'browser/ui/webui/ntp/suggestions_source_discovery.cc',
             'browser/ui/webui/ntp/suggestions_source_discovery.h',
             'browser/ui/webui/ntp/suggestions_source_top_sites.cc',
             'browser/ui/webui/ntp/suggestions_source_top_sites.h',
             'browser/ui/webui/plugins_ui.cc',
             'browser/ui/webui/plugins_ui.h',
             'browser/ui/webui/suggestions_internals/suggestions_internals_ui.cc',
             'browser/ui/webui/suggestions_internals/suggestions_internals_ui.h',
             'browser/ui/webui/suggestions_internals/suggestions_internals_ui_handler.cc',
             'browser/ui/webui/suggestions_internals/suggestions_internals_ui_handler.h',
+            'browser/ui/webui/tracing_ui.cc',
+            'browser/ui/webui/tracing_ui.h',
             'browser/ui/window_sizer/window_sizer.cc',
             'browser/ui/window_sizer/window_sizer.h',
           ],
           'sources/': [
             ['exclude', '^browser/ui/omnibox/'],
             ['exclude', '^browser/ui/panels/'],
             ['exclude', '^browser/ui/pdf/'],
             ['exclude', '^browser/ui/startup/'],
             ['exclude', '^browser/ui/tabs/'],
             ['exclude', '^browser/ui/toolbar/'],
@@ skipping 186 matching lines @@
         }],
         ['enable_message_center==1', {
           'dependencies': [
             '../ui/message_center/message_center.gyp:message_center',
           ],
         }],
       ],
     },
   ],
 }