Whitespace only text nodes need to be reattached when their siblings are reattached

Source/core/dom/Node.cpp

Index: Source/core/dom/Node.cpp
diff --git a/Source/core/dom/Node.cpp b/Source/core/dom/Node.cpp
index 89f80b54a0abb8e03fe2d50d433194f6fae29cd6..7a4f7c6541e0326fbcc40d639fe78bcb5de140f5 100644
--- a/Source/core/dom/Node.cpp
+++ b/Source/core/dom/Node.cpp
@@ -1003,6 +1003,16 @@ void Node::detach(const AttachContext& context)
 #endif
 }
 
+void Node::reattachWhitespaceSiblings() const
+{
+    for (Node* sibling = nextSibling(); sibling; sibling = sibling->nextSibling()) {
+        if (sibling->isTextNode() && toText(sibling)->containsOnlyWhitespace())
+            sibling->reattach();

[leviw_travelin_and_unemployed, 2013/11/04 23:43:09]

The previous version wouldn't reattach whitespace nodes with renderers. Getting
this right fixed the flake.

+        else if (sibling->renderer())
+            return;
+    }
+}
+
 // FIXME: This code is used by editing.  Seems like it could move over there and not pollute Node.
 Node *Node::previousNodeConsideringAtomicNodes() const
 {