Revert of Replace the remaining scoped_ptr with unique_ptr in webrtc/modules/

webrtc/modules/utility/source/process_thread_impl.h

 /*
  *  Copyright (c) 2011 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 15 matching lines @@
 
 class ProcessThreadImpl : public ProcessThread {
  public:
   explicit ProcessThreadImpl(const char* thread_name);
   ~ProcessThreadImpl() override;
 
   void Start() override;
   void Stop() override;
 
   void WakeUp(Module* module) override;
-  void PostTask(std::unique_ptr<ProcessTask> task) override;
+  void PostTask(rtc::scoped_ptr<ProcessTask> task) override;
 
   void RegisterModule(Module* module) override;
   void DeRegisterModule(Module* module) override;
 
  protected:
   static bool Run(void* obj);
   bool Process();
 
  private:
   struct ModuleCallback {
@@ skipping 30 matching lines @@
   ModuleList modules_;
   // TODO(tommi): Support delayed tasks.
   std::queue<ProcessTask*> queue_;
   bool stop_;
   const char* thread_name_;
 };
 
 }  // namespace webrtc
 
 #endif // WEBRTC_MODULES_UTILITY_SOURCE_PROCESS_THREAD_IMPL_H_