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

third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp

 /*
  * Copyright (C) 2014 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 540 matching lines @@
   if (selection.isNone())
     return false;
 
   // TODO(xiaochengh): The use of updateStyleAndLayoutIgnorePendingStylesheets
   // needs to be audited.  See http://crbug.com/590369 for more details.
   localFrame->document()->updateStyleAndLayoutIgnorePendingStylesheets();
 
   DocumentLifecycle::DisallowTransitionScope disallowTransition(
       localFrame->document()->lifecycle());
 
-  if (selection.isCaret()) {
+  if (selection.computeVisibleSelectionInDOMTreeDeprecated().isCaret()) {
     anchor = focus = selection.absoluteCaretBounds();
   } else {
     const EphemeralRange selectedRange =
         selection.computeVisibleSelectionInDOMTree()
             .toNormalizedEphemeralRange();
     if (selectedRange.isNull())
       return false;
     anchor = localFrame->editor().firstRectForRange(
         EphemeralRange(selectedRange.startPosition()));
     focus = localFrame->editor().firstRectForRange(
@@ skipping 565 matching lines @@
   return nullptr;
 }
 
 LocalFrame* WebFrameWidgetImpl::focusedLocalFrameAvailableForIme() const {
   if (!m_imeAcceptEvents)
     return nullptr;
   return focusedLocalFrameInWidget();
 }
 
 }  // namespace blink