Revert "Move innerHTML and outerHTML to Element"

Source/core/editing/markup.cpp

Index: Source/core/editing/markup.cpp
diff --git a/Source/core/editing/markup.cpp b/Source/core/editing/markup.cpp
index 2a644bebb6f51a9d2556c1248a6d63400825e522..5b0608fbd71c4235701c6eac3b80d55e904374b7 100644
--- a/Source/core/editing/markup.cpp
+++ b/Source/core/editing/markup.cpp
@@ -1075,18 +1075,4 @@ void replaceChildrenWithText(ContainerNode* container, const String& text, Excep
     containerNode->appendChild(textNode.release(), es);
 }
 
-void mergeWithNextTextNode(PassRefPtr<Node> node, ExceptionState& es)
-{
-    ASSERT(node && node->isTextNode());
-    Node* next = node->nextSibling();
-    if (!next || !next->isTextNode())
-        return;
-
-    RefPtr<Text> textNode = toText(node.get());
-    RefPtr<Text> textNext = toText(next);
-    textNode->appendData(textNext->data());
-    if (textNext->parentNode()) // Might have been removed by mutation event.
-        textNext->remove(es);
-}
-
 }