Move runin to original position when sibling element is destroyed. Additionally, if If moveRunInUnd…

LayoutTests/fast/runin/run-in-sibling-inline-block.html

Index: LayoutTests/fast/runin/run-in-sibling-inline-block.html
diff --git a/LayoutTests/fast/runin/run-in-sibling-inline-block.html b/LayoutTests/fast/runin/run-in-sibling-inline-block.html
new file mode 100644
index 0000000000000000000000000000000000000000..3a9671535b2219834caf4880262792b47020b886
--- /dev/null
+++ b/LayoutTests/fast/runin/run-in-sibling-inline-block.html
@@ -0,0 +1,24 @@
+<style>

[Julien - ping for review, 2013/07/23 21:40:12]

The test is missing a DOCTYPE (or do we *really* need it to run in quirks mode?)

+.inlineBlock { display: inline-block; }
+.runin { display: run-in; }
+</style>
+<script>
+if (window.testRunner)
+    testRunner.dumpAsText();
+var figure;
+var fieldSet;

[Julien - ping for review, 2013/07/23 21:40:12]

We don't need to define these variables here as you only use them inside the
function below.

+function boom() {
+    figure = document.createElement('figure');
+    figure.setAttribute('class', 'runin');
+    document.documentElement.appendChild(figure);
+    fieldSet = document.createElement('fieldset');
+    document.documentElement.appendChild(fieldSet);
+    document.body.offsetTop;
+    fieldSet.setAttribute('class', 'inlineBlock');
+}
+window.onload = boom;
+</script>
+<div>
+PASS if test does not crash.

[Julien - ping for review, 2013/07/23 21:40:12]

Instructions should be complete English sentences:

This test has PASSED if it did not crash.

+</div>
+