Revert 100566 - Merge 99649

LayoutTests/resources/gc.js

-// If there is no window.gc() already defined, define one using the best
-// method we can find.
-// The slow fallback should not hit in the actual test environment.
-if (!window.gc)
-{
-    window.gc = function()
-    {
-        if (window.GCController)
-            return GCController.collect();
-        function gcRec(n) {
-            if (n < 1)
-                return {};
-            var temp = {i: "ab" + i + (i / 100000)};
-            temp += "foo";
-            gcRec(n-1);
-        }
-        for (var i = 0; i < 10000; i++)
-            gcRec(10);
-    }
-}