DevTools: Make Timeline tests use only model records

LayoutTests/inspector/timeline/timeline-gc-event.html

Index: LayoutTests/inspector/timeline/timeline-gc-event.html
diff --git a/LayoutTests/inspector/timeline/timeline-gc-event.html b/LayoutTests/inspector/timeline/timeline-gc-event.html
index 3936a676f0c27e03cd7761adededd474d4a178d1..516c48945cdd403915d76153b2d86e3b33979798 100644
--- a/LayoutTests/inspector/timeline/timeline-gc-event.html
+++ b/LayoutTests/inspector/timeline/timeline-gc-event.html
@@ -16,16 +16,13 @@ function test()
 {
     InspectorTest.invokeAsyncWithTimeline("produceGarbageForGCEvents", validate);
 
-    function validate(records)
+    function validate()
     {
-        var gcRecords = InspectorTest.filterTimelineRecords(WebInspector.TimelineModel.RecordType.GCEvent, true);
-        if (gcRecords.length) {
-            InspectorTest.addResult("The expected GC event record");
-            InspectorTest.addObject(gcRecords[0], InspectorTest.timelinePropertyFormatters);
-        } else {
-            InspectorTest.addResult("FAILED: GC event record wasn't found");
-        }
-
+        var gcRecord = InspectorTest.findFirstTimelineRecord(WebInspector.TimelineModel.RecordType.GCEvent);
+        if (gcRecord)
+            InspectorTest.addResult("SUCCESS: Found expected GC event record");
+        else
+            InspectorTest.addResult("FAIL: GC event record wasn't found");
         InspectorTest.completeTest();
     }
 }