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

webrtc/modules/utility/include/process_thread.h

Index: webrtc/modules/utility/include/process_thread.h
diff --git a/webrtc/modules/utility/include/process_thread.h b/webrtc/modules/utility/include/process_thread.h
index f6913ea3167481eef084579aaf38be0c54088aeb..285a5ea5876e2e60f259220583d214cfd65d997d 100644
--- a/webrtc/modules/utility/include/process_thread.h
+++ b/webrtc/modules/utility/include/process_thread.h
@@ -11,9 +11,8 @@
 #ifndef WEBRTC_MODULES_UTILITY_INCLUDE_PROCESS_THREAD_H_
 #define WEBRTC_MODULES_UTILITY_INCLUDE_PROCESS_THREAD_H_
 
-#include <memory>
-
 #include "webrtc/typedefs.h"
+#include "webrtc/base/scoped_ptr.h"
 
 namespace webrtc {
 class Module;
@@ -30,7 +29,7 @@
  public:
   virtual ~ProcessThread();
 
-  static std::unique_ptr<ProcessThread> Create(const char* thread_name);
+  static rtc::scoped_ptr<ProcessThread> Create(const char* thread_name);
 
   // Starts the worker thread.  Must be called from the construction thread.
   virtual void Start() = 0;
@@ -51,7 +50,7 @@
   // construction thread of the ProcessThread instance, if the task did not
   // get a chance to run (e.g. posting the task while shutting down or when
   // the thread never runs).
-  virtual void PostTask(std::unique_ptr<ProcessTask> task) = 0;
+  virtual void PostTask(rtc::scoped_ptr<ProcessTask> task) = 0;
 
   // Adds a module that will start to receive callbacks on the worker thread.
   // Can be called from any thread.