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

third_party/WebKit/Source/core/editing/Editor.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  *
  * 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 245 matching lines @@
   // feedback.
   if (data == " " && !canEditRichly() &&
       isCaretAtStartOfWrappedLine(frame().selection())) {
     insertLineBreak();
   }
 
   return insertTextWithoutSendingTextEvent(data, false, event);
 }
 
 bool Editor::canEdit() const {
-  return frame().selection().rootEditableElement();
+  return frame()
+      .selection()
+      .computeVisibleSelectionInDOMTreeDeprecated()
+      .rootEditableElement();
 }
 
 bool Editor::canEditRichly() const {
   return frame()
       .selection()
       .computeVisibleSelectionInDOMTreeDeprecated()
       .isContentRichlyEditable();
 }
 
 // WinIE uses onbeforecut and onbeforepaste to enables the cut and paste menu
@@ skipping 1453 matching lines @@
 
 DEFINE_TRACE(Editor) {
   visitor->trace(m_frame);
   visitor->trace(m_lastEditCommand);
   visitor->trace(m_undoStack);
   visitor->trace(m_mark);
   visitor->trace(m_typingStyle);
 }
 
 }  // namespace blink