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

webrtc/modules/desktop_capture/win/screen_capturer_win_magnifier.cc

 /*
  *  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.
  */
 
@@ skipping 64 matching lines @@
 
 void ScreenCapturerWinMagnifier::Start(Callback* callback) {
   assert(!callback_);
   assert(callback);
   callback_ = callback;
 
   InitializeMagnifier();
 }
 
 void ScreenCapturerWinMagnifier::SetSharedMemoryFactory(
-    std::unique_ptr<SharedMemoryFactory> shared_memory_factory) {
+    rtc::scoped_ptr<SharedMemoryFactory> shared_memory_factory) {
   shared_memory_factory_ = std::move(shared_memory_factory);
 }
 
 void ScreenCapturerWinMagnifier::Capture(const DesktopRegion& region) {
   TickTime capture_start_time = TickTime::Now();
 
   queue_.MoveToNextFrame();
 
   // Request that the system not power-down the system, or the display hardware.
   if (!SetThreadExecutionState(ES_DISPLAY_REQUIRED | ES_SYSTEM_REQUIRED)) {
@@ skipping 344 matching lines @@
   assert(fallback_capturer_);
   if (!fallback_capturer_started_) {
     fallback_capturer_started_ = true;
 
     fallback_capturer_->Start(callback_);
     fallback_capturer_->SelectScreen(current_screen_id_);
   }
 }
 
 }  // namespace webrtc