Fix abort-on-changestate-headers-received.html so it passes

third_party/WebKit/LayoutTests/resources/js-test.js

Index: third_party/WebKit/LayoutTests/resources/js-test.js
diff --git a/third_party/WebKit/LayoutTests/resources/js-test.js b/third_party/WebKit/LayoutTests/resources/js-test.js
index d94f49b5a8af1e54bbd6284b97eadf2e163d6c50..0419bca488ed8250065579d5c4db3b27385c390b 100644
--- a/third_party/WebKit/LayoutTests/resources/js-test.js
+++ b/third_party/WebKit/LayoutTests/resources/js-test.js
@@ -765,9 +765,16 @@ function shouldHaveHadError(message)
 // that something is dead need to use this asynchronous collectGarbage
 // function.
 function asyncGC(callback) {
+    var documentsBefore = window.internals.numberOfLiveDocuments();
     GCController.collectAll();
     // FIXME: we need a better way of waiting for chromium events to happen
-    setTimeout(callback, 0);
+    setTimeout(function () {
+        var documentsAfter = window.internals.numberOfLiveDocuments();
+        if (documentsAfter < documentsBefore)
+            asyncGC(callback);
+        else
+            callback();
+    }, 0);
 }
 
 function gc() {