DevTools: switch Timeline frontend into buffered mode and remove the corresponding experiment.

Source/devtools/front_end/sdk/TimelineManager.js

 /*
  * Copyright (C) 2011 Google 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.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 42 matching lines @@
     /**
      * @return {boolean}
      */
     isStarted: function()
     {
         return this._dispatcher.isStarted();
     },
 
     /**
      * @param {number=} maxCallStackDepth
-     * @param {boolean=} bufferEvents
      * @param {string=} liveEvents
      * @param {boolean=} includeCounters
      * @param {boolean=} includeGPUEvents
      * @param {function(?Protocol.Error)=} callback
      */
-    start: function(maxCallStackDepth, bufferEvents, liveEvents, includeCounters, includeGPUEvents, callback)
+    start: function(maxCallStackDepth, liveEvents, includeCounters, includeGPUEvents, callback)
     {
         this._enablementCount++;
         this.target().profilingLock.acquire();
         if (WebInspector.experimentsSettings.timelineJSCPUProfile.isEnabled() && maxCallStackDepth) {
             this._configureCpuProfilerSamplingInterval();
             this._jsProfilerStarted = true;
             this.target().profilerAgent().start();
         }
         if (this._enablementCount === 1)
-            this.target().timelineAgent().start(maxCallStackDepth, bufferEvents, liveEvents, includeCounters, includeGPUEvents, callback);
+            this.target().timelineAgent().start(maxCallStackDepth, true, liveEvents, includeCounters, includeGPUEvents, callback);
         else if (callback)
             callback(null);
     },
 
     /**
      * @param {function(?Protocol.Error,?ProfilerAgent.CPUProfile)} callback
      */
     stop: function(callback)
     {
         this._enablementCount--;
         if (this._enablementCount < 0) {
             console.error("WebInspector.TimelineManager start/stop calls are unbalanced " + new Error().stack);
             return;
         }
 
         var masterError = null;
         var masterProfile = null;
         var callbackBarrier = new CallbackBarrier();
 
         if (this._jsProfilerStarted) {
             this.target().profilerAgent().stop(callbackBarrier.createCallback(profilerCallback));
             this._jsProfilerStarted = false;
         }
         if (!this._enablementCount)
             this.target().timelineAgent().stop(callbackBarrier.createCallback(timelineCallback));
-            TimelineAgent.stop(callbackBarrier.createCallback(timelineCallback));
 
         callbackBarrier.callWhenDone(allDoneCallback.bind(this));
 
         /**
          * @param {?Protocol.Error} error
          */
         function timelineCallback(error)
         {
             masterError = masterError || error;
         }
@@ skipping 96 matching lines @@
     },
 
     /**
      * @param {number} count
      */
     progress: function(count)
     {
         this._manager.dispatchEventToListeners(WebInspector.TimelineManager.EventTypes.TimelineProgress, count);
     }
 }