Revert of Use std::unique_ptr<> to pass frame ownership in DesktopCapturer impls.

webrtc/modules/desktop_capture/desktop_frame_win.h

 /*
  *  Copyright (c) 2013 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.
  */
 
 #ifndef WEBRTC_MODULES_DESKTOP_CAPTURE_DESKTOP_FRAME_WIN_H_
 #define WEBRTC_MODULES_DESKTOP_CAPTURE_DESKTOP_FRAME_WIN_H_
 
 #include <memory>
 
 #include <windows.h>
 
 #include "webrtc/base/constructormagic.h"
 #include "webrtc/modules/desktop_capture/desktop_frame.h"
 #include "webrtc/typedefs.h"
 
 namespace webrtc {
 
 // DesktopFrame implementation used by screen and window captures on Windows.
 // Frame data is stored in a GDI bitmap.
 class DesktopFrameWin : public DesktopFrame {
  public:
   virtual ~DesktopFrameWin();
-
-  static std::unique_ptr<DesktopFrameWin>
-  Create(DesktopSize size, SharedMemoryFactory* shared_memory_factory, HDC hdc);
+  static DesktopFrameWin* Create(DesktopSize size,
+                                 SharedMemoryFactory* shared_memory_factory,
+                                 HDC hdc);
 
   HBITMAP bitmap() { return bitmap_; }
 
  private:
   DesktopFrameWin(DesktopSize size,
                   int stride,
                   uint8_t* data,
                   std::unique_ptr<SharedMemory> shared_memory,
                   HBITMAP bitmap);
 
   HBITMAP bitmap_;
   std::unique_ptr<SharedMemory> owned_shared_memory_;
 
   RTC_DISALLOW_COPY_AND_ASSIGN(DesktopFrameWin);
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_DESKTOP_CAPTURE_DESKTOP_FRAME_WIN_H_