Cleanup LayoutTests that define a function gc().

third_party/WebKit/LayoutTests/fast/forms/removed-image-as-property.html

Index: third_party/WebKit/LayoutTests/fast/forms/removed-image-as-property.html
diff --git a/third_party/WebKit/LayoutTests/fast/forms/removed-image-as-property.html b/third_party/WebKit/LayoutTests/fast/forms/removed-image-as-property.html
index 0062ce37fbe8261428eb21af3ef7b0812a282f67..cc02423708385d5065da3dc4e687bd1147c6d191 100644
--- a/third_party/WebKit/LayoutTests/fast/forms/removed-image-as-property.html
+++ b/third_party/WebKit/LayoutTests/fast/forms/removed-image-as-property.html
@@ -4,22 +4,13 @@
 <form className="a">
 <img src="" id="i">
 </form>
+<script src="../../resources/gc.js"></script>
 <script>
 if (window.testRunner) {
     testRunner.dumpAsText();
     testRunner.waitUntilDone();
 }
 
-function gc()
-{
-    if (window.GCController)
-        return GCController.collect();
-
-    for (var i = 0; i < 10000; i++) { // > force garbage collection (FF requires about 9K allocations before a collect)
-        var s = new String("abc");
-    }
-}
-
 function test()
 {
     var f = document.getElementsByTagName("form")[0];