Tidy up ConsoleMessage callstack inclusion, fix Worker console crashes

LayoutTests/fast/workers/worker-console-log.html

Index: LayoutTests/fast/workers/worker-console-log.html
diff --git a/LayoutTests/fast/workers/worker-console-log.html b/LayoutTests/fast/workers/worker-console-log.html
index 23c9ec06c0ef2586552b895d08f55b6a8e76a217..3066c1f6d7f8f327525f13c5d720dfeab49d68bb 100644
--- a/LayoutTests/fast/workers/worker-console-log.html
+++ b/LayoutTests/fast/workers/worker-console-log.html
@@ -30,8 +30,11 @@
         console.warn("warn");
         console.info("info");
         console.debug("debug");
+        console.count("count");
+        console.time("time");
         /*
         // FIXME(slightlyoff): these aren't getting logged properly from here!
+        console.timeEnd("time");
         console.assert(true);
         console.assert(false);
         console.markTimeline("markTimeline");