Cleanup shared memory handling in DesktopCapturer interface.

webrtc/modules/desktop_capture/desktop_frame.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.
  */
 
@@ skipping 92 matching lines @@
   // Creates a BasicDesktopFrame that contains copy of |frame|.
   static DesktopFrame* CopyOf(const DesktopFrame& frame);
 
  private:
   RTC_DISALLOW_COPY_AND_ASSIGN(BasicDesktopFrame);
 };
 
 // A DesktopFrame that stores data in shared memory.
 class SharedMemoryDesktopFrame : public DesktopFrame {
  public:
+  static rtc::scoped_ptr<DesktopFrame> Create(
+      DesktopSize size,
+      SharedMemoryFactory* shared_memory_factory);
+
   // Takes ownership of |shared_memory|.
+  // TODO(sergeyu): Remove this constructor and keep the second one.
   SharedMemoryDesktopFrame(DesktopSize size,
                            int stride,
                            SharedMemory* shared_memory);
+  SharedMemoryDesktopFrame(DesktopSize size,
+                           int stride,
+                           rtc::scoped_ptr<SharedMemory> shared_memory);
   ~SharedMemoryDesktopFrame() override;
 
  private:
   RTC_DISALLOW_COPY_AND_ASSIGN(SharedMemoryDesktopFrame);
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_DESKTOP_CAPTURE_DESKTOP_FRAME_H_