Expand FrameSeleciton::isCaret() to increase chances of hoisting update layout

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 1121 matching lines @@
       // coordinates to use high resolution image on high DPI screens.
       dragImage = dragImageForImage(element, image, screenDeviceScaleFactor,
                                     dragOrigin, imageRect.location(),
                                     imageSizeInPixels, dragLocation);
     }
     doSystemDrag(dragImage.get(), dragLocation, dragOrigin, dataTransfer, src,
                  false);
   } else if (state.m_dragType == DragSourceActionLink) {
     if (linkURL.isEmpty())
       return false;
-    if (src->selection().isCaret() && src->selection().isContentEditable()) {
+    if (src->selection()
+            .computeVisibleSelectionInDOMTreeDeprecated()
+            .isCaret() &&
+        src->selection().isContentEditable()) {
       // a user can initiate a drag on a link without having any text
       // selected.  In this case, we should expand the selection to
       // the enclosing anchor element
       if (Node* node = enclosingAnchorElement(src->selection().base())) {
         src->selection().setSelection(
             SelectionInDOMTree::Builder().selectAllChildren(*node).build());
       }
     }
 
     if (!dragImage) {
@@ skipping 84 matching lines @@
 
 DEFINE_TRACE(DragController) {
   visitor->trace(m_page);
   visitor->trace(m_documentUnderMouse);
   visitor->trace(m_dragInitiator);
   visitor->trace(m_dragState);
   visitor->trace(m_fileInputElementUnderMouse);
 }
 
 }  // namespace blink