DevTools: merge TracingTimelineUIUtils into TimelineUIUtils

Source/devtools/front_end/timeline/TracingTimelineModel.js

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @constructor
  * @param {!WebInspector.TracingManager} tracingManager
  * @param {!WebInspector.TracingModel} tracingModel
  * @param {!WebInspector.TimelineModel.Filter} recordFilter
  * @extends {WebInspector.TimelineModel}
@@ skipping 455 matching lines @@
                 if (!recordStack.length)
                     topLevelRecords.push(top);
             }
             if (event.phase === WebInspector.TracingModel.Phase.AsyncEnd || event.phase === WebInspector.TracingModel.Phase.NestableAsyncEnd)
                 continue;
             var parentRecord = recordStack.peekLast();
             // Maintain the back-end logic of old timeline, skip console.time() / console.timeEnd() that are not properly nested.
             if (WebInspector.TracingModel.isAsyncBeginPhase(event.phase) && parentRecord && event.endTime > parentRecord._event.endTime)
                 continue;
             var record = new WebInspector.TracingTimelineModel.TraceEventRecord(this, event);
-            if (WebInspector.TracingTimelineUIUtils.isMarkerEvent(event))
+            if (WebInspector.TimelineUIUtils.isMarkerEvent(event))
                 this._eventDividerRecords.push(record);
             if (!this._recordFilter.accept(record))
                 continue;
             if (parentRecord)
                 parentRecord._addChild(record);
             if (event.endTime)
                 recordStack.push(record);
         }
 
         if (recordStack.length)
@@ skipping 796 matching lines @@
     _initializePerFrameState: function()
     {
         /** @type {!Array.<!WebInspector.InvalidationTrackingEvent>} */
         this._invalidationEvents = [];
         this._lastStyleRecalcEventIndex = 0;
         this._lastLayoutEventIndex = 0;
         this._lastPaintWithLayer = undefined;
         this._didPaint = false;
     }
 }