Range.surroundContents() should not check node types beforehand.

third_party/WebKit/Source/core/dom/Range.cpp

 /*
  * (C) 1999 Lars Knoll (knoll@kde.org)
  * (C) 2000 Gunnstein Lye (gunnstein@netcom.no)
  * (C) 2000 Frederik Holljen (frederik.holljen@hig.no)
  * (C) 2001 Peter Kelly (pmk@post.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All
  * rights reserved.
  * Copyright (C) 2011 Motorola Mobility. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 1362 matching lines @@
     parentOfNewParent = parentOfNewParent->parentNode();
 
   if (!parentOfNewParent) {
     exceptionState.throwDOMException(HierarchyRequestError,
                                      "The container node is a detached "
                                      "character data node; no parent node is "
                                      "available for insertion.");
     return;
   }
 
-  if (!parentOfNewParent->childTypeAllowed(newParent->getNodeType())) {
-    exceptionState.throwDOMException(HierarchyRequestError,
-                                     "The node provided is of type '" +
-                                         newParent->nodeName() +
-                                         "', which may not be inserted here.");
-    return;
-  }
-
   EventQueueScope scope;
 
+  // 3. Let fragment be the result of extracting context object.
+  DocumentFragment* fragment = extractContents(exceptionState);
+  if (exceptionState.hadException())
+    return;
+
   // 4. If newParent has children, replace all with null within newParent.
   while (Node* n = newParent->firstChild()) {
     toContainerNode(newParent)->removeChild(n, exceptionState);
     if (exceptionState.hadException())
       return;
   }
 
-  // 3. Let fragment be the result of extracting context object.
-  DocumentFragment* fragment = extractContents(exceptionState);
-  if (exceptionState.hadException())
-    return;
-
   // 5. If newParent has children, replace all with null within newParent.
   insertNode(newParent, exceptionState);
   if (exceptionState.hadException())
     return;
 
   // 6. Append fragment to newParent.
   newParent->appendChild(fragment, exceptionState);
   if (exceptionState.hadException())
     return;
 
@@ skipping 413 matching lines @@
                      .data()
               << "start offset: " << range->startOffset()
               << ", end offset: " << range->endOffset();
   } else {
     LOG(INFO) << "Cannot show tree if range is null, or if boundary points are "
                  "invalid.";
   }
 }
 
 #endif