Cleanup LayoutTests that define a function gc().

third_party/WebKit/LayoutTests/http/tests/inspector/network/from-disk-cache-timing.html

Index: third_party/WebKit/LayoutTests/http/tests/inspector/network/from-disk-cache-timing.html
diff --git a/third_party/WebKit/LayoutTests/http/tests/inspector/network/from-disk-cache-timing.html b/third_party/WebKit/LayoutTests/http/tests/inspector/network/from-disk-cache-timing.html
index 5b6353e71cff0c9c3afed537543ef1808d758249..aa1e99dda2f6b68c30194d1cef77c494497df538 100644
--- a/third_party/WebKit/LayoutTests/http/tests/inspector/network/from-disk-cache-timing.html
+++ b/third_party/WebKit/LayoutTests/http/tests/inspector/network/from-disk-cache-timing.html
@@ -3,6 +3,7 @@
 <script src="../inspector-test.js"></script>
 <script src="../network-test.js"></script>
 <script src="../debugger-test.js"></script>
+<script src="../../../../resources/gc.js"></script>
 <script>
 
 var scriptElement;
@@ -18,13 +19,6 @@ function unloadScript()
     scriptElement.parentElement.removeChild(scriptElement);
 }
 
-function gc()
-{
-    // In Oilpan, Resource objects are not destructed until GC.
-    if (window.GCController)
-        GCController.collectAll();
-}
-
 function test()
 {
     var timeZero = 0;