The fast/history/page-cache-webdatabase-pending-transaction.html layout test is flaky on GTK+. It fails sometimes.
When it fails, the diff is the following:
@@ -1,11 +1 @@
-Tests that a page with an open WebDatabase that has pending transactions does not go into the page cache.
-On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
-pageshow - not from cache
-PASS Page was not restored from page cache
-PASS successfullyParsed is true
+This page should go back. If a test outputs the contents of this page, then the test page failed to enter the page cache.