Move implementation from header to source.

base/base.gypi

 # Copyright (c) 2010 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': {
     'variables': {
       'base_target': 0,
       'base_extra_target': 0,
     },
@@ skipping 217 matching lines @@
           'sys_info_freebsd.cc',
           'sys_info_linux.cc',
           'sys_info_mac.cc',
           'sys_info_openbsd.cc',
           'sys_info_posix.cc',
           'sys_info_win.cc',
           'sys_string_conversions.h',
           'sys_string_conversions_linux.cc',
           'sys_string_conversions_mac.mm',
           'sys_string_conversions_win.cc',
+          'task.cc',
           'task.h',
           'template_util.h',
           'thread.cc',
           'thread.h',
           'thread_collision_warner.cc',
           'thread_collision_warner.h',
           'thread_local.h',
           'thread_local_posix.cc',
           'thread_local_storage.h',
           'thread_local_storage_posix.cc',
@@ skipping 22 matching lines @@
           'values.cc',
           'values.h',
           'waitable_event.h',
           'waitable_event_posix.cc',
           'waitable_event_watcher.h',
           'waitable_event_watcher_posix.cc',
           'waitable_event_watcher_win.cc',
           'waitable_event_win.cc',
           'watchdog.cc',
           'watchdog.h',
+          'weak_ptr.cc',
           'weak_ptr.h',
           'win_util.cc',
           'win_util.h',
           'windows_message_list.h',
           'wmi_util.cc',
           'wmi_util.h',
           'worker_pool.h',
           'worker_pool_linux.cc',
           'worker_pool_linux.h',
           'worker_pool_mac.h',
@@ skipping 446 matching lines @@
             'third_party/xdg_mime/xdgmimemagic.c',
             'third_party/xdg_mime/xdgmimemagic.h',
             'third_party/xdg_mime/xdgmimeparent.c',
             'third_party/xdg_mime/xdgmimeparent.h',
           ],
         },
       ],
     }],
   ],
 }