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

webrtc/modules/utility/include/mock/mock_process_thread.h

Index: webrtc/modules/utility/include/mock/mock_process_thread.h
diff --git a/webrtc/modules/utility/include/mock/mock_process_thread.h b/webrtc/modules/utility/include/mock/mock_process_thread.h
index 3d39307ba4ddd5838ccf28b6dd4ec9ab45391a49..9560e408e87f5de0c974eec7df08bf6cdbf20141 100644
--- a/webrtc/modules/utility/include/mock/mock_process_thread.h
+++ b/webrtc/modules/utility/include/mock/mock_process_thread.h
@@ -31,7 +31,7 @@
   // MOCK_METHOD1 gets confused with mocking this method, so we work around it
   // by overriding the method from the interface and forwarding the call to a
   // mocked, simpler method.
-  void PostTask(std::unique_ptr<ProcessTask> task) override {
+  void PostTask(rtc::scoped_ptr<ProcessTask> task) override {
     PostTask(task.get());
   }
 };