Add fast path for querySelector(All)

PerformanceTests/Parser/query-selector-all-last.html

Index: PerformanceTests/Parser/query-selector-all-last.html
diff --git a/PerformanceTests/Parser/query-selector-last.html b/PerformanceTests/Parser/query-selector-all-last.html
similarity index 66%
copy from PerformanceTests/Parser/query-selector-last.html
copy to PerformanceTests/Parser/query-selector-all-last.html
index 45c1cdbe9100c474d665bbc4d620a1b5034b5576..c9f205b9b4c266b3113f5e049ccd96456c289720 100644
--- a/PerformanceTests/Parser/query-selector-last.html
+++ b/PerformanceTests/Parser/query-selector-all-last.html
@@ -16,12 +16,12 @@ h1.className = "class";
 document.body.appendChild(h1);
 
 PerfTestRunner.measureRunsPerSecond({
-    description: "This benchmark tests querySelector() for an element that appears near the tail of the document",
+    description: "This benchmark tests querySelectorAll() for an element that appears near the tail of the document",
     run: function() {
         for (var i = 0; i < 100; i++) {
-            document.querySelector("h1");
-            document.querySelector("#id");
-            document.querySelector(".class");
+            document.querySelectorAll("h1");
+            document.querySelectorAll("#id");
+            document.querySelectorAll(".class");
         }
     }});
 </script>