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

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

 /*
  * Copyright (C) 2004, 2008, 2009, 2010 Apple Inc. All rights reserved.
  *
  * 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 612 matching lines @@
     HTMLSelectElement* selectElement =
         toHTMLSelectElement(document().focusedElement());
     if (selectElement->canSelectAll()) {
       selectElement->selectAll();
       return;
     }
   }
 
   Node* root = nullptr;
   Node* selectStartTarget = nullptr;
-  if (isContentEditable()) {
+  if (computeVisibleSelectionInDOMTreeDeprecated().isContentEditable()) {
     root = highestEditableRoot(
         computeVisibleSelectionInDOMTreeDeprecated().start());
     if (Node* shadowRoot = nonBoundaryShadowTreeRootNode(
             computeVisibleSelectionInDOMTreeDeprecated().start()))
       selectStartTarget = shadowRoot->ownerShadowHost();
     else
       selectStartTarget = root;
   } else {
     root = nonBoundaryShadowTreeRootNode(
         computeVisibleSelectionInDOMTreeDeprecated().start());
@@ skipping 535 matching lines @@
 }
 
 void showTree(const blink::FrameSelection* sel) {
   if (sel)
     sel->showTreeForThis();
   else
     LOG(INFO) << "Cannot showTree for <null> FrameSelection.";
 }
 
 #endif