DevTools: fix front-end compilation problems after #399131

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 295 matching lines @@
 {
     return WebInspector.TimelineUIUtils._interactionPhaseStyles().get(phase).label;
 }
 
 /**
  * @param {!RuntimeAgent.CallFrame} frame
  * @return {boolean}
  */
 WebInspector.TimelineUIUtils.isUserFrame = function(frame)
 {
-    return frame.scriptId !== "0" && frame.url && !frame.url.startsWith("native ");
+    return frame.scriptId !== "0" && !(frame.url && frame.url.startsWith("native "));
 }
 
 /**
  * @param {!WebInspector.TracingModel.Event} event
  * @return {?RuntimeAgent.CallFrame}
  */
 WebInspector.TimelineUIUtils.topStackFrame = function(event)
 {
     var stackTrace = event.stackTrace || event.initiator && event.initiator.stackTrace;
     return stackTrace && stackTrace.length ? stackTrace[0] : null;
@@ skipping 1808 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;
 }