Don't move uneditable paragraph contents in CompositeEditCommand::moveParagraphContentsToNewBlockIfN

Source/core/editing/ApplyStyleCommand.cpp

 /*
  * Copyright (C) 2005, 2006, 2008, 2009 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 247 matching lines @@
     int startIndex = TextIterator::rangeLength(startRange.get(), true);
     int endIndex = TextIterator::rangeLength(endRange.get(), true);
 
     VisiblePosition paragraphStart(startOfParagraph(visibleStart));
     VisiblePosition nextParagraphStart(endOfParagraph(paragraphStart).next());
     VisiblePosition beyondEnd(endOfParagraph(visibleEnd).next());
     while (paragraphStart.isNotNull() && paragraphStart != beyondEnd) {
         StyleChange styleChange(style, paragraphStart.deepEquivalent());
         if (styleChange.cssStyle().length() || m_removeOnly) {
             RefPtrWillBeRawPtr<Node> block = enclosingBlock(paragraphStart.deepEquivalent().deprecatedNode());
-            if (!m_removeOnly) {
-                RefPtrWillBeRawPtr<Element> newBlock = moveParagraphContentsToNewBlockIfNecessary(paragraphStart.deepEquivalent());
+            const Position& paragraphStartToMove = paragraphStart.deepEquivalent();
+            if (!m_removeOnly && isEditablePosition(paragraphStartToMove)) {
+                RefPtrWillBeRawPtr<Element> newBlock = moveParagraphContentsToNewBlockIfNecessary(paragraphStartToMove);
                 if (newBlock)
                     block = newBlock;
             }
             ASSERT(!block || block->isHTMLElement());
             if (block && block->isHTMLElement()) {
                 removeCSSStyle(style, toHTMLElement(block));
                 if (!m_removeOnly)
                     addBlockStyle(styleChange, toHTMLElement(block));
             }
 
@@ skipping 1287 matching lines @@
 void ApplyStyleCommand::trace(Visitor* visitor)
 {
     visitor->trace(m_style);
     visitor->trace(m_start);
     visitor->trace(m_end);
     visitor->trace(m_styledInlineElement);
     CompositeEditCommand::trace(visitor);
 }
 
 }