DevTools: remove most convenience wrappers from WI.TimelineModel.Record

LayoutTests/inspector/tracing/timeline-network-received-data.html

Index: LayoutTests/inspector/tracing/timeline-network-received-data.html
diff --git a/LayoutTests/inspector/tracing/timeline-network-received-data.html b/LayoutTests/inspector/tracing/timeline-network-received-data.html
index 851c8807e717ff20774e76ecc3fbc454b00a3f1e..a7372e67c1d606ab01f60c6ebecb41f394292175 100644
--- a/LayoutTests/inspector/tracing/timeline-network-received-data.html
+++ b/LayoutTests/inspector/tracing/timeline-network-received-data.html
@@ -39,7 +39,8 @@ function test()
         InspectorTest.addResult("Script evaluated.");
         var record = InspectorTest.findFirstTimelineRecord("ResourceReceivedData");
         if (record) {
-            if (record.data() && typeof record.data().encodedDataLength === "number")
+            var data = record.traceEvent().args["data"];
+            if (data && typeof data.encodedDataLength === "number")
                 InspectorTest.addResult("Resource received data has length, test passed.");
         }
         InspectorTest.completeTest();