Don't move uneditable style and link elements during deletion

LayoutTests/editing/deleting/delete-uneditable-style.html

Index: LayoutTests/editing/deleting/delete-uneditable-style.html
diff --git a/LayoutTests/editing/deleting/delete-uneditable-style.html b/LayoutTests/editing/deleting/delete-uneditable-style.html
new file mode 100644
index 0000000000000000000000000000000000000000..29fb4fd5c98082c41187a28f6adafc83b359028e
--- /dev/null
+++ b/LayoutTests/editing/deleting/delete-uneditable-style.html
@@ -0,0 +1,22 @@
+<script src="../../resources/dump-as-markup.js"></script>
+<div contentEditable id="test">
+  <span id="start">start</span>
+  editable-1
+  <div contentEditable="false">
+    <style>#end { color: red; }</style>
+    <link type="foo" href="bar">
+    uneditable
+  </div>
+  editable-2
+<span id="end">end</span>
+</div>
+<script>
+Markup.description('Test case for crash bug http://crbug.com/177470');
+function $(id) { return document.getElementById(id); }
+var range = document.createRange();
+range.setStart($('start'));
+range.setEnd($('end'), NaN);
+getSelection().addRange(range);
+document.execCommand('delete', null, '');
+Markup.dump($('test'));
+</script>