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

third_party/WebKit/Source/web/WebViewImpl.cpp

 /*
  * Copyright (C) 2011, 2012 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 2338 matching lines @@
 // well. This code needs to be refactored  (http://crbug.com/629721).
 bool WebViewImpl::selectionBounds(WebRect& anchor, WebRect& focus) const {
   const Frame* frame = focusedCoreFrame();
   if (!frame || !frame->isLocalFrame())
     return false;
 
   const LocalFrame* localFrame = toLocalFrame(frame);
   if (!localFrame)
     return false;
   FrameSelection& selection = localFrame->selection();
-  if (!selection.isAvailable() || selection.isNone()) {
+  if (!selection.isAvailable() ||
+      selection.computeVisibleSelectionInDOMTreeDeprecated().isNone()) {
     // plugins/mouse-capture-inside-shadow.html reaches here.
     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());
@@ skipping 1791 matching lines @@
   if (focusedFrame->localFrameRoot() != mainFrameImpl()->frame())
     return nullptr;
   return focusedFrame;
 }
 
 LocalFrame* WebViewImpl::focusedLocalFrameAvailableForIme() const {
   return m_imeAcceptEvents ? focusedLocalFrameInWidget() : nullptr;
 }
 
 }  // namespace blink