[Part 1 of 6] Move MockWebContentsTaskManager into its own file.

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 2169 matching lines @@
       'browser/notifications/notification.cc',
       'browser/notifications/notification.h',
       'browser/notifications/notification_delegate.h',
       'browser/notifications/notification_display_service.h',
       'browser/notifications/notification_display_service_factory.cc',
       'browser/notifications/notification_display_service_factory.h',
       'browser/notifications/notification_object_proxy.cc',
       'browser/notifications/notification_object_proxy.h',
       'browser/notifications/notification_permission_context.cc',
       'browser/notifications/notification_permission_context.h',
+      'browser/notifications/notification_platform_bridge.h',
       'browser/notifications/notification_platform_bridge_mac.h',
       'browser/notifications/notification_platform_bridge_mac.mm',
-      'browser/notifications/notification_platform_bridge.h',
       'browser/notifications/notification_ui_manager.h',
       'browser/notifications/notifier_state_tracker.cc',
       'browser/notifications/notifier_state_tracker.h',
       'browser/notifications/notifier_state_tracker_factory.cc',
       'browser/notifications/notifier_state_tracker_factory.h',
       'browser/notifications/persistent_notification_delegate.cc',
       'browser/notifications/persistent_notification_delegate.h',
       'browser/notifications/platform_notification_service_impl.cc',
       'browser/notifications/platform_notification_service_impl.h',
       'browser/notifications/profile_notification.cc',
@@ skipping 806 matching lines @@
       'browser/sync/profile_sync_service_android.h',
       'browser/sync/sync_sessions_metrics_android.cc',
       'browser/sync/sync_sessions_metrics_android.h',
     ],
     'chrome_browser_task_manager_sources': [
       # Stats collection for CAPS (uses old task manager):
       'browser/caps/generate_state_json.cc',
       'browser/caps/generate_state_json.h',
 
       # New Task Manager Sources:
+      'browser/task_management/mock_web_contents_task_manager.cc',
+      'browser/task_management/mock_web_contents_task_manager.h',

[ncarter (slow), 2016/05/06 18:49:12]

Actually, come to think of it: these are test files, and belong in
chrome_tests.gypi

       'browser/task_management/providers/browser_process_task.cc',
       'browser/task_management/providers/browser_process_task.h',
       'browser/task_management/providers/browser_process_task_provider.cc',
       'browser/task_management/providers/browser_process_task_provider.h',
       'browser/task_management/providers/child_process_task.cc',
       'browser/task_management/providers/child_process_task.h',
       'browser/task_management/providers/child_process_task_provider.cc',
       'browser/task_management/providers/child_process_task_provider.h',
       'browser/task_management/providers/task.cc',
       'browser/task_management/providers/task.h',
@@ skipping 43 matching lines @@
       'browser/task_management/providers/web_contents/web_contents_task_provider.cc',
       'browser/task_management/providers/web_contents/web_contents_task_provider.h',
       'browser/task_management/sampling/task_group.cc',
       'browser/task_management/sampling/task_group.h',
       'browser/task_management/sampling/task_group_sampler.cc',
       'browser/task_management/sampling/task_group_sampler.h',
       'browser/task_management/sampling/task_manager_impl.cc',
       'browser/task_management/sampling/task_manager_impl.h',
       'browser/task_management/sampling/task_manager_io_thread_helper.cc',
       'browser/task_management/sampling/task_manager_io_thread_helper.h',
-      'browser/task_management/task_management_browsertest_util.cc',
-      'browser/task_management/task_management_browsertest_util.h',
       'browser/task_management/task_manager_interface.cc',
       'browser/task_management/task_manager_interface.h',
       'browser/task_management/task_manager_observer.cc',
       'browser/task_management/task_manager_observer.h',
 
       # Old Task Manager Sources:
       'browser/task_manager/background_information.cc',
       'browser/task_manager/background_information.h',
       'browser/task_manager/browser_process_resource_provider.cc',
       'browser/task_manager/browser_process_resource_provider.h',
@@ skipping 1168 matching lines @@
             '../components/components.gyp:rlz',
             '../components/components.gyp:search_engines',
             '../rlz/rlz.gyp:rlz_lib',
             'common',
           ],
         },
       ],
     }],
   ],
 }