Add clean layout DCHECK to mostForwardCaretPosition()

third_party/WebKit/Source/core/editing/commands/ReplaceSelectionCommand.cpp

Index: third_party/WebKit/Source/core/editing/commands/ReplaceSelectionCommand.cpp
diff --git a/third_party/WebKit/Source/core/editing/commands/ReplaceSelectionCommand.cpp b/third_party/WebKit/Source/core/editing/commands/ReplaceSelectionCommand.cpp
index 114e8543491a09cf284e8fc10fe4fc55a10228b0..32def58d761d13ff9eeca76f83140dde8e42649b 100644
--- a/third_party/WebKit/Source/core/editing/commands/ReplaceSelectionCommand.cpp
+++ b/third_party/WebKit/Source/core/editing/commands/ReplaceSelectionCommand.cpp
@@ -1977,6 +1977,10 @@ bool ReplaceSelectionCommand::performTrivialReplace(
           endingSelection().start()))
     return false;
 
+  // TODO(editing-dev): Use of updateStyleAndLayoutIgnorePendingStylesheets
+  // needs to be audited.  See http://crbug.com/590369 for more details.
+  document().updateStyleAndLayoutIgnorePendingStylesheets();
+
   Node* nodeAfterInsertionPos =
       mostForwardCaretPosition(endingSelection().end()).anchorNode();
   Text* textNode = toText(fragment.firstChild());