Replace "nested message loop" with "nested run loop" in comments.

third_party/WebKit/Source/core/page/DragController.cpp

 /*
  * Copyright (C) 2007, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 355 matching lines @@
   if (drag_initiator_ && !document_under_mouse_->GetSecurityOrigin()->CanAccess(
                              drag_initiator_->GetSecurityOrigin()))
     return false;
 
   bool is_handling_drag = false;
   if (action_mask & kDragDestinationActionDHTML) {
     is_handling_drag =
         TryDHTMLDrag(drag_data, drag_session.operation, local_root);
     // Do not continue if m_documentUnderMouse has been reset by tryDHTMLDrag.
     // tryDHTMLDrag fires dragenter event. The event listener that listens
-    // to this event may create a nested message loop (open a modal dialog),
+    // to this event may create a nested run loop (open a modal dialog),
     // which could process dragleave event and reset m_documentUnderMouse in
     // dragExited.
     if (!document_under_mouse_)
       return false;
   }
 
   // It's unclear why this check is after tryDHTMLDrag.
   // We send drag events in tryDHTMLDrag and that may be the reason.
   FrameView* frame_view = document_under_mouse_->View();
   if (!frame_view)
@@ skipping 881 matching lines @@
 
 DEFINE_TRACE(DragController) {
   visitor->Trace(page_);
   visitor->Trace(document_under_mouse_);
   visitor->Trace(drag_initiator_);
   visitor->Trace(drag_state_);
   visitor->Trace(file_input_element_under_mouse_);
 }
 
 }  // namespace blink