Remove style spans to follow the styles of list item

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

 /*
  * Copyright (C) 2005, 2006, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2009, 2010, 2011 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:
  * 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
@@ skipping 781 matching lines @@
             next = NodeTraversal::next(*node);
         }
     }
 }
 
 // Remove style spans before insertion if they are unnecessary.  It's faster because we'll
 // avoid doing a layout.
 static bool handleStyleSpansBeforeInsertion(ReplacementFragment& fragment, const Position& insertionPos)
 {
     Node* topNode = fragment.firstChild();
+    if (!isHTMLSpanElement(topNode))
+        return false;
 
     // Handling the case where we are doing Paste as Quotation or pasting into quoted content is more complicated (see handleStyleSpans)
     // and doesn't receive the optimization.
     if (isMailPasteAsQuotationHTMLBlockQuoteElement(topNode) || enclosingNodeOfType(firstPositionInOrBeforeNode(topNode), isMailHTMLBlockquoteElement, CanCrossEditingBoundary))
         return false;
 
+    // Remove style spans to follow the styles of list item when |fragment| becomes a list item.
+    // See bug http://crbug.com/335955.
+    HTMLSpanElement* wrappingStyleSpan = toHTMLSpanElement(topNode);
+    if (isListItem(enclosingBlock(insertionPos.anchorNode()))) {
+        fragment.removeNodePreservingChildren(wrappingStyleSpan);
+        return true;
+    }
+
     // Either there are no style spans in the fragment or a WebKit client has added content to the fragment
     // before inserting it.  Look for and handle style spans after insertion.
     if (!isLegacyAppleHTMLSpanElement(topNode))
         return false;
 
-    HTMLSpanElement* wrappingStyleSpan = toHTMLSpanElement(topNode);
     EditingStyle* styleAtInsertionPos = EditingStyle::create(insertionPos.parentAnchoredEquivalent());
     String styleText = styleAtInsertionPos->style()->asText();
 
     // FIXME: This string comparison is a naive way of comparing two styles.
     // We should be taking the diff and check that the diff is empty.
     if (styleText != wrappingStyleSpan->getAttribute(styleAttr))
         return false;
 
     fragment.removeNodePreservingChildren(wrappingStyleSpan);
     return true;
@@ skipping 896 matching lines @@
     visitor->trace(m_startOfInsertedContent);
     visitor->trace(m_endOfInsertedContent);
     visitor->trace(m_insertionStyle);
     visitor->trace(m_documentFragment);
     visitor->trace(m_startOfInsertedRange);
     visitor->trace(m_endOfInsertedRange);
     CompositeEditCommand::trace(visitor);
 }
 
 } // namespace blink