Clean up and deflake history navigation test

LayoutTests/fast/loader/stateobjects/document-destroyed-navigate-back-with-fragment-scroll.html

Index: LayoutTests/fast/loader/stateobjects/document-destroyed-navigate-back-with-fragment-scroll.html
diff --git a/LayoutTests/fast/loader/stateobjects/document-destroyed-navigate-back-with-fragment-scroll.html b/LayoutTests/fast/loader/stateobjects/document-destroyed-navigate-back-with-fragment-scroll.html
index 67bf15cb0ab7d9bfaf794965a5116b458aee7db2..eb9e3ee58859b5f54920a6e4173c06cecced14f5 100644
--- a/LayoutTests/fast/loader/stateobjects/document-destroyed-navigate-back-with-fragment-scroll.html
+++ b/LayoutTests/fast/loader/stateobjects/document-destroyed-navigate-back-with-fragment-scroll.html
@@ -18,34 +18,19 @@ function hashOf(url)
 {
     return url.substring(url.lastIndexOf('#'));
 }
- 
+
 function runFirstStageOfTest()
-{   
+{
     history.replaceState("FirstEntry", null, "#FirstEntry");
     history.pushState("SecondEntry", null, "#SecondEntry");
     history.back();
 }
 
-function runSecondStageOfTest()
-{
-    alert("Last path component of location is " + lastPathComponent(location.href));
-    setTimeout("history.back();", 0);
-}
-
-function runThirdStageOfTest()
-{
-    alert("Final stage of test loaded");
-}
-
 function runTest()
 {
     alert("LOADED");
     if (!sessionStorage.stage)
         runFirstStageOfTest();
-    else if (sessionStorage.stage == 2)
-        runSecondStageOfTest();
-    else if (sessionStorage.stage == 3)
-        runThirdStageOfTest();
 }
 
 onpopstate = function()