DirectX based screen capturer logic

webrtc/modules/desktop_capture/desktop_capture_options.h

Index: webrtc/modules/desktop_capture/desktop_capture_options.h
diff --git a/webrtc/modules/desktop_capture/desktop_capture_options.h b/webrtc/modules/desktop_capture/desktop_capture_options.h
index 68bb5884459ea13fe569a8e0d10483091f1f0450..2bf995876297eda4fb962729217e2b242b09ac84 100644
--- a/webrtc/modules/desktop_capture/desktop_capture_options.h
+++ b/webrtc/modules/desktop_capture/desktop_capture_options.h
@@ -83,6 +83,14 @@ class DesktopCaptureOptions {
   void set_allow_use_magnification_api(bool allow) {
     allow_use_magnification_api_ = allow;
   }
+  // Allowing directx based capturer or not, this capturer works on windows 7
+  // with platform update / windows 8 or upper.
+  bool allow_directx_capturer() const {
+    return allow_directx_capturer_;
+  }
+  void set_allow_directx_capturer(bool enabled) {
+    allow_directx_capturer_ = enabled;
+  }
 #endif
 
  private:
@@ -98,6 +106,7 @@ class DesktopCaptureOptions {
 
 #if defined(WEBRTC_WIN)
   bool allow_use_magnification_api_;
+  bool allow_directx_capturer_;
 #endif
   bool use_update_notifications_;
   bool disable_effects_;