Unflake inspector/tracing/timeline-load-event.html test

TBR=caseq
NOTRY=true

Review URL: https://codereview.chromium.org/1648183002 .

Cr-Commit-Position: refs/heads/master@{#372258}

third_party/WebKit/LayoutTests/inspector/tracing/timeline-load-event.html

@@ -16,6 +16,7 @@ function display(callback)
 
 function test()
 {
+    WebInspector.panels.timeline._captureJSProfileSetting.set(false);
     InspectorTest.startTimeline(function() { InspectorTest.reloadPage(pageReloaded); });
 
     function pageReloaded()