Add DesktopCapturer GetSourceList SelectSource FocusOnSelectedSource functions

webrtc/modules/desktop_capture/window_capturer.h

Index: webrtc/modules/desktop_capture/window_capturer.h
diff --git a/webrtc/modules/desktop_capture/window_capturer.h b/webrtc/modules/desktop_capture/window_capturer.h
index 682778c5586126903ebc4464716f0cf95f87dcb8..5667702cba717b0cb5220f08394e6c2ac317341a 100644
--- a/webrtc/modules/desktop_capture/window_capturer.h
+++ b/webrtc/modules/desktop_capture/window_capturer.h
@@ -23,6 +23,7 @@ namespace webrtc {
 
 class DesktopCaptureOptions;
 
+// TODO(zijiehe): Remove this class.
 class WindowCapturer : public DesktopCapturer {
  public:
   typedef webrtc::WindowId WindowId;
@@ -36,20 +37,29 @@ class WindowCapturer : public DesktopCapturer {
 
   typedef std::vector<Window> WindowList;
 
+  // Consumers should use DesktopCapturer::CreateWindowCapturer.
   static WindowCapturer* Create(const DesktopCaptureOptions& options);
 
-  ~WindowCapturer() override {}
+  ~WindowCapturer() override;
 
+  // Deprecated, use GetSourceList().
   // Get list of windows. Returns false in case of a failure.
-  virtual bool GetWindowList(WindowList* windows) = 0;
+  virtual bool GetWindowList(WindowList* windows);
 
+  // Deprecated, use SelectSource().
   // Select window to be captured. Returns false in case of a failure (e.g. if
   // there is no window with the specified id).
-  virtual bool SelectWindow(WindowId id) = 0;
+  virtual bool SelectWindow(WindowId id);
 
+  // Deprecated, use FocusOnSelectedSource().
   // Bring the selected window to the front. Returns false in case of a
   // failure or no window selected.
-  virtual bool BringSelectedWindowToFront() = 0;
+  virtual bool BringSelectedWindowToFront();
+
+  // DesktopCapturer interfaces.
+  bool GetSourceList(SourceList* sources) override;
+  bool SelectSource(SourceId id) override;
+  bool FocusOnSelectedSource() override;
 };
 
 }  // namespace webrtc