Revert of Speculative fix for ui::DisplayLinkMac::StopDisplayLink crashes

ui/accelerated_widget_mac/display_link_mac.cc

Index: ui/accelerated_widget_mac/display_link_mac.cc
diff --git a/ui/accelerated_widget_mac/display_link_mac.cc b/ui/accelerated_widget_mac/display_link_mac.cc
index b7c5805870c7c52b0cc170a364f8e5edae6cda10..d9cc46876f9f53a8aea2e04a668421efe6f5ffd5 100644
--- a/ui/accelerated_widget_mac/display_link_mac.cc
+++ b/ui/accelerated_widget_mac/display_link_mac.cc
@@ -85,14 +85,6 @@
 
 DisplayLinkMac::~DisplayLinkMac() {
   StopDisplayLink();
-
-  // Usually |display_link_| holds the last reference to CVDisplayLinkRef, but
-  // that's not guaranteed, so it might not free all resources after the
-  // destructor completes. Ensure the callback is cleared out regardless to
-  // avoid possible crashes (see http://crbug.com/564780).
-  CVReturn ret =
-      CVDisplayLinkSetOutputCallback(display_link_, nullptr, nullptr);
-  DCHECK_EQ(kCGErrorSuccess, ret);
 
   DisplayMap::iterator found = display_map_.Get().find(display_id_);
   DCHECK(found != display_map_.Get().end());