Make replacing selection in heading/paragraph with heading/paragraph to work

Source/core/editing/ReplaceSelectionCommand.cpp

Index: Source/core/editing/ReplaceSelectionCommand.cpp
diff --git a/Source/core/editing/ReplaceSelectionCommand.cpp b/Source/core/editing/ReplaceSelectionCommand.cpp
index 5552606ea490aa14e0dd73881ecdb3b2caa03785..2c8df795520c9ce0a157f132b2ed4a1e9a7b9c56 100644
--- a/Source/core/editing/ReplaceSelectionCommand.cpp
+++ b/Source/core/editing/ReplaceSelectionCommand.cpp
@@ -638,6 +638,9 @@ void ReplaceSelectionCommand::moveNodeOutOfAncestor(PassRefPtr<Node> prpNode, Pa
     RefPtr<Node> node = prpNode;
     RefPtr<Node> ancestor = prpAncestor;
 
+    if (ancestor->parentNode()->attached() && !ancestor->parentNode()->rendererIsEditable())

[rniwa-cr, 2013/06/11 06:32:00]

Why are we checking attached()? That doesn't make much sense given
rendererIsEditable looks for the node with a renderer. If this is causing a
problem, then we might be in a need of another style resolution.

[yosin_UTC9, 2013/06/11 08:07:42]

You're right.
Remove attached() check.

+        return;
+
     VisiblePosition positionAtEndOfNode = lastPositionInOrAfterNode(node.get());
     VisiblePosition lastPositionInParagraph = lastPositionInNode(ancestor.get());
     if (positionAtEndOfNode == lastPositionInParagraph) {