Add CreateWindowCapturer() and CreateScreenCapturer() in DesktopCapturer

webrtc/modules/desktop_capture/desktop_capturer.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 @@
   virtual bool GetSourceList(SourceList* sources);
 
   // Selects a source to be captured. Returns false in case of a failure (e.g.
   // if there is no source with the specified type and id.)
   virtual bool SelectSource(SourceId id);
 
   // Brings the selected source to the front and sets the input focus on it.
   // Returns false in case of a failure or no source has been selected or the
   // implementation does not support this functionality.
   virtual bool FocusOnSelectedSource();
+
+  // Creates a DesktopCapturer instance which targets to capture windows.
+  static std::unique_ptr<DesktopCapturer> CreateWindowCapturer(
+      const DesktopCaptureOptions& options);
+
+  // Creates a DesktopCapturer instance which targets to capture screens.
+  static std::unique_ptr<DesktopCapturer> CreateScreenCapturer(
+      const DesktopCaptureOptions& options);
+
+ protected:
+  // CroppingWindowCapturer needs to create raw capturers without wrappers, so
+  // the following two functions are protected.
+
+  // Creates a platform specific DesktopCapturer instance which targets to
+  // capture windows.
+  static std::unique_ptr<DesktopCapturer> CreateRawWindowCapturer(
+      const DesktopCaptureOptions& options);
+
+  // Creates a platform specific DesktopCapturer instance which targets to
+  // capture screens.
+  static std::unique_ptr<DesktopCapturer> CreateRawScreenCapturer(
+      const DesktopCaptureOptions& options);
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_DESKTOP_CAPTURE_DESKTOP_CAPTURER_H_