Implement SequencedTaskChecker.

webrtc/base/BUILD.gn

 # Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 import("//build/config/crypto.gni")
 import("//build/config/ui.gni")
@@ skipping 174 matching lines @@
   }
 }
 
 static_library("rtc_task_queue") {
   public_deps = [
     ":rtc_base_approved",
   ]
   configs += [ "..:common_config" ]
 
   sources = [
+    "sequenced_task_checker.h",
+    "sequenced_task_checker_impl.cc",
+    "sequenced_task_checker_impl.h",
     "task_queue.h",
     "task_queue_posix.h",
   ]
 
   if (rtc_build_libevent) {
     deps = [
       "//base/third_party/libevent",
     ]
   }
 
@@ skipping 488 matching lines @@
       "java/src/org/webrtc/Logging.java",
       "java/src/org/webrtc/Size.java",
       "java/src/org/webrtc/ThreadUtils.java",
     ]
 
     deps = [
       "//base:base_java",
     ]
   }
 }