Split rtc_task_queue target. Add separate target for sequenced_task_checker and weak_ptr.

webrtc/test/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("../webrtc.gni")
 import("//build/config/ui.gni")
@@ skipping 462 matching lines @@
     "..:video_stream_api",
     "..:webrtc_common",
     "../api:transport_api",
     "../api:video_frame_api",
     "../api/audio_codecs:builtin_audio_decoder_factory",
     "../api/audio_codecs:builtin_audio_encoder_factory",
     "../api/video_codecs:video_codecs_api",
     "../audio",
     "../base:rtc_base_approved",
     "../base:rtc_task_queue",
+    "../base:sequenced_task_checker",
     "../call",
     "../common_video",
     "../logging:rtc_event_log_api",
     "../modules/audio_device:mock_audio_device",
     "../modules/audio_mixer:audio_mixer_impl",
     "../modules/audio_processing",
     "../modules/rtp_rtcp",
     "../modules/rtp_rtcp:mock_rtp_rtcp",
     "../modules/video_coding:webrtc_h264",
     "../modules/video_coding:webrtc_vp8",
@@ skipping 109 matching lines @@
     java_files = [
       "android/org/webrtc/native_test/RTCNativeUnitTest.java",
       "android/org/webrtc/native_test/RTCNativeUnitTestActivity.java",
     ]
     deps = [
       "//testing/android/native_test:native_test_java",
       "//webrtc/base:base_java",
     ]
   }
 }