Ensure clean layout for VisibleSelection::selectionFromContentsOfNode

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 951 matching lines @@
   if (selectStartTarget) {
     const Document& expectedDocument = document();
     if (selectStartTarget->dispatchEvent(Event::createCancelableBubble(
             EventTypeNames::selectstart)) != DispatchEventResult::NotCanceled)
       return;
     // |root| may be detached due to selectstart event.
     if (!root->isConnected() || expectedDocument != root->document())
       return;
   }
 
+  // TODO(xiaochengh): The use of updateStyleAndLayoutIgnorePendingStylesheets
+  // needs to be audited.  See http://crbug.com/590369 for more details.
+  document().updateStyleAndLayoutIgnorePendingStylesheets();
+
   VisibleSelection newSelection(
       VisibleSelection::selectionFromContentsOfNode(root));
   setSelection(newSelection);
   selectFrameElementInParentIfFullySelected();
   notifyLayoutObjectOfSelectionChange(UserTriggered);
 }
 
 bool FrameSelection::setSelectedRange(Range* range,
                                       TextAffinity affinity,
                                       SelectionDirectionalMode directional,
@@ skipping 498 matching lines @@
 }
 
 void showTree(const blink::FrameSelection* sel) {
   if (sel)
     sel->showTreeForThis();
   else
     LOG(INFO) << "Cannot showTree for <null> FrameSelection.";
 }
 
 #endif