Use kCGDisplayStreamUpdateDirtyRects.

webrtc/modules/desktop_capture/screen_capturer_mac.mm

Index: webrtc/modules/desktop_capture/screen_capturer_mac.mm
diff --git a/webrtc/modules/desktop_capture/screen_capturer_mac.mm b/webrtc/modules/desktop_capture/screen_capturer_mac.mm
index 316aa3dbe6a04da78bad6a39ea21f7baa22638d8..3de253707cb9b2b557ee9fad45e7636697c92951 100644
--- a/webrtc/modules/desktop_capture/screen_capturer_mac.mm
+++ b/webrtc/modules/desktop_capture/screen_capturer_mac.mm
@@ -287,10 +287,6 @@ class ScreenCapturerMac : public ScreenCapturer {
   void UnregisterRefreshAndMoveHandlers();
 
   void ScreenRefresh(CGRectCount count, const CGRect *rect_array);
-  void ScreenUpdateMove(CGFloat delta_x,
-                        CGFloat delta_y,
-                        size_t count,
-                        const CGRect* rect_array);
   void ScreenRefreshCallback(CGRectCount count, const CGRect* rect_array);
   void ReleaseBuffers();
 
@@ -945,25 +941,8 @@ bool ScreenCapturerMac::RegisterRefreshAndMoveHandlers() {
           size_t count = 0;
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wunguarded-availability"
-// TODO(erikchen): Use kCGDisplayStreamUpdateDirtyRects.
           const CGRect* rects = CGDisplayStreamUpdateGetRects(
-              updateRef, kCGDisplayStreamUpdateMovedRects, &count);
-#pragma clang diagnostic pop
-          if (count != 0) {
-            CGFloat dx = 0;
-            CGFloat dy = 0;
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wunguarded-availability"
-            CGDisplayStreamUpdateGetMovedRectsDelta(updateRef, &dx, &dy);
-#pragma clang diagnostic pop
-            ScreenUpdateMove(dx, dy, count, rects);
-          }
-
-          count = 0;
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wunguarded-availability"
-          rects = CGDisplayStreamUpdateGetRects(
-              updateRef, kCGDisplayStreamUpdateRefreshedRects, &count);
+              updateRef, kCGDisplayStreamUpdateDirtyRects, &count);
 #pragma clang diagnostic pop
           if (count != 0) {
             // According to CGDisplayStream.h, it's safe to call
@@ -1011,20 +990,6 @@ void ScreenCapturerMac::ScreenRefresh(CGRectCount count,
   helper_.InvalidateRegion(region);
 }
 
-void ScreenCapturerMac::ScreenUpdateMove(CGFloat delta_x,
-                                         CGFloat delta_y,
-                                         size_t count,
-                                         const CGRect* rect_array) {
-  // Translate |rect_array| to identify the move's destination.
-  CGRect refresh_rects[count];
-  for (CGRectCount i = 0; i < count; ++i) {
-    refresh_rects[i] = CGRectOffset(rect_array[i], delta_x, delta_y);
-  }
-
-  // Currently we just treat move events the same as refreshes.
-  ScreenRefresh(count, refresh_rects);
-}
-
 void ScreenCapturerMac::ScreenRefreshCallback(CGRectCount count,
                                               const CGRect* rect_array) {
   if (screen_pixel_bounds_.is_empty())