Partial Reland of Make the default ctor of rtc::Thread, protected

webrtc/pc/test/fakeaudiocapturemodule.cc

 /*
  *  Copyright 2012 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.
  */
 
@@ skipping 606 matching lines @@
   return false;
 }
 
 bool FakeAudioCaptureModule::ShouldStartProcessing() {
   return recording_ || playing_;
 }
 
 void FakeAudioCaptureModule::UpdateProcessing(bool start) {
   if (start) {
     if (!process_thread_) {
-      process_thread_.reset(new rtc::Thread());
+      process_thread_ = rtc::Thread::Create();
       process_thread_->Start();
     }
     process_thread_->Post(RTC_FROM_HERE, this, MSG_START_PROCESS);
   } else {
     if (process_thread_) {
       process_thread_->Stop();
       process_thread_.reset(nullptr);
     }
     started_ = false;
   }
@@ skipping 77 matching lines @@
                                               kNumberBytesPerSample,
                                               kNumberOfChannels,
                                               kSamplesPerSecond, kTotalDelayMs,
                                               kClockDriftMs, current_mic_level,
                                               key_pressed,
                                               current_mic_level) != 0) {
     RTC_NOTREACHED();
   }
   SetMicrophoneVolume(current_mic_level);
 }