DevTools: render markers as circles on the main timeline.

third_party/WebKit/Source/devtools/front_end/timeline/TimelineUIUtils.js

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  * Copyright (C) 2012 Intel Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 420 matching lines @@
         if (url)
             detailsText = WebInspector.displayNameForURL(url) + ":" + eventData["lineNumber"];
         break;
     case recordType.ParseScriptOnBackground:
     case recordType.XHRReadyStateChange:
     case recordType.XHRLoad:
         var url = eventData["url"];
         if (url)
             detailsText = WebInspector.displayNameForURL(url);
         break;
+    case recordType.TimeStamp:
+        detailsText = eventData["message"];
+        break;
 
     case recordType.WebSocketCreate:
     case recordType.WebSocketSendHandshakeRequest:
     case recordType.WebSocketReceiveHandshakeResponse:
     case recordType.WebSocketDestroy:
     case recordType.ResourceSendRequest:
     case recordType.ResourceReceivedData:
     case recordType.ResourceReceiveResponse:
     case recordType.ResourceFinish:
     case recordType.PaintImage:
@@ skipping 1684 matching lines @@
     case warnings.V8Deopt:
         span.appendChild(WebInspector.linkifyURLAsNode("https://github.com/GoogleChrome/devtools-docs/issues/53",
             WebInspector.UIString("Not optimized"), undefined, true));
         span.createTextChild(WebInspector.UIString(": %s", eventData["deoptReason"]));
         break;
     default:
         console.assert(false, "Unhandled TimelineModel.WarningType");
     }
     return span;
 }