Extract implementation based on timeline events into TimelineModelImpl

Source/devtools/front_end/timeline/TimelineModel.js

 /*
  * Copyright (C) 2012 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 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 /**
  * @constructor
  * @extends {WebInspector.Object}
- * @param {!WebInspector.TimelineManager} timelineManager
+ * @param {!WebInspector.Target} target
  */
-WebInspector.TimelineModel = function(timelineManager)
+WebInspector.TimelineModel = function(target)
 {
-    this._timelineManager = timelineManager;
     this._filters = [];
-    this._bindings = new WebInspector.TimelineModel.InterRecordBindings();
-
-    this.reset();
-
-    this._timelineManager.addEventListener(WebInspector.TimelineManager.EventTypes.TimelineEventRecorded, this._onRecordAdded, this);
-    this._timelineManager.addEventListener(WebInspector.TimelineManager.EventTypes.TimelineStarted, this._onStarted, this);
-    this._timelineManager.addEventListener(WebInspector.TimelineManager.EventTypes.TimelineStopped, this._onStopped, this);
-    this._timelineManager.addEventListener(WebInspector.TimelineManager.EventTypes.TimelineProgress, this._onProgress, this);
+    this._target = target;
 }
 
-WebInspector.TimelineModel.TransferChunkLengthBytes = 5000000;
-
 WebInspector.TimelineModel.RecordType = {
     Root: "Root",
     Program: "Program",
     EventDispatch: "EventDispatch",
 
     GPUTask: "GPUTask",
 
     RequestMainThreadFrame: "RequestMainThreadFrame",
     BeginFrame: "BeginFrame",
     ActivateLayerTree: "ActivateLayerTree",
@@ skipping 88 matching lines @@
     }
     return processRecords(recordsArray, 0);
 }
 
 WebInspector.TimelineModel.prototype = {
     /**
      * @return {!WebInspector.Target}
      */
     target: function()
     {
-        return this._timelineManager.target();
+        return this._target;
     },
 
     /**
      * @return {boolean}
      */
     loadedFromFile: function()
     {
-        return this._loadedFromFile;
+        return false;
     },
 
     /**
      * @param {?function(!WebInspector.TimelineModel.Record)|?function(!WebInspector.TimelineModel.Record,number)} preOrderCallback
      * @param {function(!WebInspector.TimelineModel.Record)|function(!WebInspector.TimelineModel.Record,number)=} postOrderCallback
      */
     forAllRecords: function(preOrderCallback, postOrderCallback)
     {
         WebInspector.TimelineModel.forAllRecords(this._records, preOrderCallback, postOrderCallback);
     },
@@ skipping 48 matching lines @@
                 return false;
         }
         return true;
     },
 
     _filterChanged: function()
     {
         this.dispatchEventToListeners(WebInspector.TimelineModel.Events.RecordFilterChanged);
     },
 
-    /**
-     * @param {boolean} captureStacks
-     * @param {boolean} captureMemory
-     */
-    startRecording: function(captureStacks, captureMemory)
-    {
-        this._clientInitiatedRecording = true;
-        this.reset();
-        var maxStackFrames = captureStacks ? 30 : 0;
-        this._bufferEvents = WebInspector.experimentsSettings.timelineNoLiveUpdate.isEnabled();
-        var includeGPUEvents = WebInspector.experimentsSettings.gpuTimeline.isEnabled();
-        var liveEvents = [ WebInspector.TimelineModel.RecordType.BeginFrame,
-                           WebInspector.TimelineModel.RecordType.DrawFrame,
-                           WebInspector.TimelineModel.RecordType.RequestMainThreadFrame,
-                           WebInspector.TimelineModel.RecordType.ActivateLayerTree ];
-        this._timelineManager.start(maxStackFrames, this._bufferEvents, liveEvents.join(","), captureMemory, includeGPUEvents, this._fireRecordingStarted.bind(this));
-    },
-
-    stopRecording: function()
-    {
-        if (!this._clientInitiatedRecording) {
-            this._timelineManager.start(undefined, undefined, undefined, undefined, undefined, stopTimeline.bind(this));
-            return;
-        }
-
-        /**
-         * Console started this one and we are just sniffing it. Initiate recording so that we
-         * could stop it.
-         * @this {WebInspector.TimelineModel}
-         */
-        function stopTimeline()
-        {
-            this._timelineManager.stop(this._fireRecordingStopped.bind(this));
-        }
-
-        this._clientInitiatedRecording = false;
-        this._timelineManager.stop(this._fireRecordingStopped.bind(this));
-    },
-
     willStartRecordingTraceEvents: function()
     {
         this.reset();
-        this._fireRecordingStarted();
+        this.dispatchEventToListeners(WebInspector.TimelineModel.Events.RecordingStarted);
     },
 
     /**
      * @param {!Array.<!WebInspector.TracingModel.Event>} mainThreadEvents
      */
     didStopRecordingTraceEvents: function(mainThreadEvents)
     {
         var recordStack = [];
         for (var i = 0, size = mainThreadEvents.length; i < size; ++i) {
             var event = mainThreadEvents[i];
             while (recordStack.length) {
                 var top = recordStack.peekLast();
                 if (top._event.endTime >= event.startTime)
                     break;
                 recordStack.pop();
             }
             var parentRecord = recordStack.peekLast() || null;
             var record = new WebInspector.TimelineModel.TraceEventRecord(this, event, parentRecord);
             if (WebInspector.TimelineUIUtils.isEventDivider(record))
                 this._eventDividerRecords.push(record);
             if (!recordStack.length)
                 this._addTopLevelRecord(record);
             if (event.endTime)
                 recordStack.push(record);
         }
-        this._fireRecordingStopped(null, null);
+        this.dispatchEventToListeners(WebInspector.TimelineModel.Events.RecordingStopped);
     },
 
     /**
      * @param {!WebInspector.TimelineModel.TraceEventRecord} record
      */
     _addTopLevelRecord: function(record)
     {
         this._updateBoundaries(record);
         this._records.push(record);
         if (record.type() === WebInspector.TimelineModel.RecordType.Program)
             this._mainThreadTasks.push(record);
         if (record.type() === WebInspector.TimelineModel.RecordType.GPUTask)
             this._gpuThreadTasks.push(record);
         this.dispatchEventToListeners(WebInspector.TimelineModel.Events.RecordAdded, record);
     },
 
     /**
      * @return {!Array.<!WebInspector.TimelineModel.Record>}
      */
     records: function()
     {
         return this._records;
     },
 
     /**
-     * @param {!WebInspector.Event} event
-     */
-    _onRecordAdded: function(event)
-    {
-        if (this._collectionEnabled)
-            this._addRecord(/** @type {!TimelineAgent.TimelineEvent} */(event.data));
-    },
-
-    /**
-     * @param {!WebInspector.Event} event
-     */
-    _onStarted: function(event)
-    {
-        if (event.data) {
-            // Started from console.
-            this._fireRecordingStarted();
-        }
-    },
-
-    /**
-     * @param {!WebInspector.Event} event
-     */
-    _onStopped: function(event)
-    {
-        if (event.data) {
-            // Stopped from console.
-            this._fireRecordingStopped(null, null);
-        }
-    },
-
-    /**
-     * @param {!WebInspector.Event} event
-     */
-    _onProgress: function(event)
-    {
-        this.dispatchEventToListeners(WebInspector.TimelineModel.Events.RecordingProgress, event.data);
-    },
-
-    _fireRecordingStarted: function()
-    {
-        this._collectionEnabled = true;
-        this.dispatchEventToListeners(WebInspector.TimelineModel.Events.RecordingStarted);
-    },
-
-    /**
-     * @param {?Protocol.Error} error
-     * @param {?ProfilerAgent.CPUProfile} cpuProfile
-     */
-    _fireRecordingStopped: function(error, cpuProfile)
-    {
-        this._bufferEvents = false;
-        this._collectionEnabled = false;
-        if (cpuProfile)
-            WebInspector.TimelineJSProfileProcessor.mergeJSProfileIntoTimeline(this, cpuProfile);
-        this.dispatchEventToListeners(WebInspector.TimelineModel.Events.RecordingStopped);
-    },
-
-    /**
      * @return {boolean}
      */
     bufferEvents: function()
     {
-        return this._bufferEvents;
+        return false;
     },
 
     /**
-     * @param {!TimelineAgent.TimelineEvent} payload
-     */
-    _addRecord: function(payload)
-    {
-        this._internStrings(payload);
-        this._payloads.push(payload);
-
-        var record = this._innerAddRecord(payload, null);
-        this._updateBoundaries(record);
-        this._records.push(record);
-        if (record.type() === WebInspector.TimelineModel.RecordType.Program)
-            this._mainThreadTasks.push(record);
-        if (record.type() === WebInspector.TimelineModel.RecordType.GPUTask)
-            this._gpuThreadTasks.push(record);
-
-        this.dispatchEventToListeners(WebInspector.TimelineModel.Events.RecordAdded, record);
-    },
-
-    /**
-     * @param {!TimelineAgent.TimelineEvent} payload
-     * @param {?WebInspector.TimelineModel.Record} parentRecord
-     * @return {!WebInspector.TimelineModel.Record}
-     * @this {!WebInspector.TimelineModel}
-     */
-    _innerAddRecord: function(payload, parentRecord)
-    {
-        var record = new WebInspector.TimelineModel.RecordImpl(this, payload, parentRecord);
-        if (WebInspector.TimelineUIUtils.isEventDivider(record))
-            this._eventDividerRecords.push(record);
-
-        for (var i = 0; payload.children && i < payload.children.length; ++i)
-            this._innerAddRecord.call(this, payload.children[i], record);
-
-        record._calculateAggregatedStats();
-        if (parentRecord)
-            parentRecord._selfTime -= record.endTime() - record.startTime();
-        return record;
-    },
-
-    /**
      * @param {!Blob} file
      * @param {!WebInspector.Progress} progress
      */
     loadFromFile: function(file, progress)
     {
-        var delegate = new WebInspector.TimelineModelLoadFromFileDelegate(this, progress);
-        var fileReader = this._createFileReader(file, delegate);
-        var loader = new WebInspector.TimelineModelLoader(this, fileReader, progress);
-        fileReader.start(loader);
+        throw new Error("Not implemented");
     },
 
     /**
      * @param {string} url
      * @param {!WebInspector.Progress} progress
      */
     loadFromURL: function(url, progress)
     {
-        var delegate = new WebInspector.TimelineModelLoadFromFileDelegate(this, progress);
-        var urlReader = new WebInspector.ChunkedXHRReader(url, delegate);
-        var loader = new WebInspector.TimelineModelLoader(this, urlReader, progress);
-        urlReader.start(loader);
-    },
-
-    _createFileReader: function(file, delegate)
-    {
-        return new WebInspector.ChunkedFileReader(file, WebInspector.TimelineModel.TransferChunkLengthBytes, delegate);
-    },
-
-    _createFileWriter: function()
-    {
-        return new WebInspector.FileOutputStream();
+        throw new Error("Not implemented");
     },
 
     saveToFile: function()
     {
-        var now = new Date();
-        var fileName = "TimelineRawData-" + now.toISO8601Compact() + ".json";
-        var stream = this._createFileWriter();
-
-        /**
-         * @param {boolean} accepted
-         * @this {WebInspector.TimelineModel}
-         */
-        function callback(accepted)
-        {
-            if (!accepted)
-                return;
-            var saver = new WebInspector.TimelineSaver(stream);
-            saver.save(this._payloads, window.navigator.appVersion);
-        }
-        stream.open(fileName, callback.bind(this));
+        throw new Error("Not implemented");
     },
 
     reset: function()
     {
         this._loadedFromFile = false;
         this._records = [];
-        this._payloads = [];
-        this._stringPool = {};
         this._minimumRecordTime = -1;
         this._maximumRecordTime = -1;
-        this._bindings._reset();
         /** @type {!Array.<!WebInspector.TimelineModel.Record>} */
         this._mainThreadTasks =  [];
         /** @type {!Array.<!WebInspector.TimelineModel.Record>} */
         this._gpuThreadTasks = [];
         /** @type {!Array.<!WebInspector.TimelineModel.Record>} */
         this._eventDividerRecords = [];
         this.dispatchEventToListeners(WebInspector.TimelineModel.Events.RecordsCleared);
     },
 
     /**
@@ skipping 43 matching lines @@
     },
 
     /**
      * @return {!Array.<!WebInspector.TimelineModel.Record>}
      */
     eventDividerRecords: function()
     {
         return this._eventDividerRecords;
     },
 
-    /**
-     * @param {!TimelineAgent.TimelineEvent} record
-     */
-    _internStrings: function(record)
-    {
-        for (var name in record) {
-            var value = record[name];
-            if (typeof value !== "string")
-                continue;
-
-            var interned = this._stringPool[value];
-            if (typeof interned === "string")
-                record[name] = interned;
-            else
-                this._stringPool[value] = value;
-        }
-
-        var children = record.children;
-        for (var i = 0; children && i < children.length; ++i)
-            this._internStrings(children[i]);
-    },
-
     __proto__: WebInspector.Object.prototype
 }
 
-
-/**
- * @constructor
- */
-WebInspector.TimelineModel.InterRecordBindings = function() {
-    this._reset();
-}
-
-WebInspector.TimelineModel.InterRecordBindings.prototype = {
-    _reset: function()
-    {
-        this._sendRequestRecords = {};
-        this._timerRecords = {};
-        this._requestAnimationFrameRecords = {};
-        this._layoutInvalidate = {};
-        this._lastScheduleStyleRecalculation = {};
-        this._webSocketCreateRecords = {};
-    }
-}
-
 /**
  * @interface
  */
 WebInspector.TimelineModel.Record = function()
 {
 }
 
 WebInspector.TimelineModel.Record.prototype = {
     /**
      * @return {?Array.<!ConsoleAgent.CallFrame>}
@@ skipping 304 matching lines @@
         if (data) {
             for (var key in data)
                 tokens.push(data[key]);
         }
         return regExp.test(tokens.join("|"));
     }
 }
 
 /**
  * @constructor
- * @implements {WebInspector.TimelineModel.Record}
- * @param {!WebInspector.TimelineModel} model
- * @param {!TimelineAgent.TimelineEvent} timelineEvent
- * @param {?WebInspector.TimelineModel.Record} parentRecord
- */
-WebInspector.TimelineModel.RecordImpl = function(model, timelineEvent, parentRecord)
-{
-    this._model = model;
-    var bindings = this._model._bindings;
-    this._aggregatedStats = {};
-    this._record = timelineEvent;
-    this._children = [];
-    if (parentRecord) {
-        this.parent = parentRecord;
-        parentRecord.children().push(this);
-    }
-
-    this._selfTime = this.endTime() - this.startTime();
-
-    var recordTypes = WebInspector.TimelineModel.RecordType;
-    switch (timelineEvent.type) {
-    case recordTypes.ResourceSendRequest:
-        // Make resource receive record last since request was sent; make finish record last since response received.
-        bindings._sendRequestRecords[timelineEvent.data["requestId"]] = this;
-        break;
-
-    case recordTypes.ResourceReceiveResponse:
-    case recordTypes.ResourceReceivedData:
-    case recordTypes.ResourceFinish:
-        this._initiator = bindings._sendRequestRecords[timelineEvent.data["requestId"]];
-        break;
-
-    case recordTypes.TimerInstall:
-        bindings._timerRecords[timelineEvent.data["timerId"]] = this;
-        break;
-
-    case recordTypes.TimerFire:
-        this._initiator = bindings._timerRecords[timelineEvent.data["timerId"]];
-        break;
-
-    case recordTypes.RequestAnimationFrame:
-        bindings._requestAnimationFrameRecords[timelineEvent.data["id"]] = this;
-        break;
-
-    case recordTypes.FireAnimationFrame:
-        this._initiator = bindings._requestAnimationFrameRecords[timelineEvent.data["id"]];
-        break;
-
-    case recordTypes.ScheduleStyleRecalculation:
-        bindings._lastScheduleStyleRecalculation[this.frameId()] = this;
-        break;
-
-    case recordTypes.RecalculateStyles:
-        this._initiator = bindings._lastScheduleStyleRecalculation[this.frameId()];
-        break;
-
-    case recordTypes.InvalidateLayout:
-        // Consider style recalculation as a reason for layout invalidation,
-        // but only if we had no earlier layout invalidation records.
-        var layoutInitator = this;
-        if (!bindings._layoutInvalidate[this.frameId()] && parentRecord.type() === recordTypes.RecalculateStyles)
-            layoutInitator = parentRecord._initiator;
-        bindings._layoutInvalidate[this.frameId()] = layoutInitator;
-        break;
-
-    case recordTypes.Layout:
-        this._initiator = bindings._layoutInvalidate[this.frameId()];
-        bindings._layoutInvalidate[this.frameId()] = null;
-        if (this.stackTrace())
-            this.addWarning(WebInspector.UIString("Forced synchronous layout is a possible performance bottleneck."));
-        break;
-
-    case recordTypes.WebSocketCreate:
-        bindings._webSocketCreateRecords[timelineEvent.data["identifier"]] = this;
-        break;
-
-    case recordTypes.WebSocketSendHandshakeRequest:
-    case recordTypes.WebSocketReceiveHandshakeResponse:
-    case recordTypes.WebSocketDestroy:
-        this._initiator = bindings._webSocketCreateRecords[timelineEvent.data["identifier"]];
-        break;
-    }
-}
-
-WebInspector.TimelineModel.RecordImpl.prototype = {
-    /**
-     * @return {?Array.<!ConsoleAgent.CallFrame>}
-     */
-    callSiteStackTrace: function()
-    {
-        return this._initiator ? this._initiator.stackTrace() : null;
-    },
-
-    /**
-     * @return {?WebInspector.TimelineModel.Record}
-     */
-    initiator: function()
-    {
-        return this._initiator;
-    },
-
-    /**
-     * @return {!WebInspector.Target}
-     */
-    target: function()
-    {
-        return this._model.target();
-    },
-
-    /**
-     * @return {number}
-     */
-    selfTime: function()
-    {
-        return this._selfTime;
-    },
-
-    /**
-     * @return {!Array.<!WebInspector.TimelineModel.Record>}
-     */
-    children: function()
-    {
-        return this._children;
-    },
-
-    /**
-     * @return {!WebInspector.TimelineCategory}
-     */
-    category: function()
-    {
-        return WebInspector.TimelineUIUtils.categoryForRecord(this);
-    },
-
-    /**
-     * @return {string}
-     */
-    title: function()
-    {
-        return WebInspector.TimelineUIUtils.recordTitle(this, this._model);
-    },
-
-    /**
-     * @return {number}
-     */
-    startTime: function()
-    {
-        return this._record.startTime;
-    },
-
-    /**
-     * @return {string|undefined}
-     */
-    thread: function()
-    {
-        return this._record.thread;
-    },
-
-    /**
-     * @return {number}
-     */
-    endTime: function()
-    {
-        return this._endTime || this._record.endTime || this._record.startTime;
-    },
-
-    /**
-     * @param {number} endTime
-     */
-    setEndTime: function(endTime)
-    {
-        this._endTime = endTime;
-    },
-
-    /**
-     * @return {!Object}
-     */
-    data: function()
-    {
-        return this._record.data;
-    },
-
-    /**
-     * @return {string}
-     */
-    type: function()
-    {
-        return this._record.type;
-    },
-
-    /**
-     * @return {string}
-     */
-    frameId: function()
-    {
-        return this._record.frameId || "";
-    },
-
-    /**
-     * @return {?Array.<!ConsoleAgent.CallFrame>}
-     */
-    stackTrace: function()
-    {
-        if (this._record.stackTrace && this._record.stackTrace.length)
-            return this._record.stackTrace;
-        return null;
-    },
-
-    /**
-     * @param {string} key
-     * @return {?Object}
-     */
-    getUserObject: function(key)
-    {
-        if (!this._userObjects)
-            return null;
-        return this._userObjects.get(key);
-    },
-
-    /**
-     * @param {string} key
-     * @param {?Object|undefined} value
-     */
-    setUserObject: function(key, value)
-    {
-        if (!this._userObjects)
-            this._userObjects = new StringMap();
-        this._userObjects.put(key, value);
-    },
-
-    _calculateAggregatedStats: function()
-    {
-        this._aggregatedStats = {};
-
-        for (var index = this._children.length; index; --index) {
-            var child = this._children[index - 1];
-            for (var category in child._aggregatedStats)
-                this._aggregatedStats[category] = (this._aggregatedStats[category] || 0) + child._aggregatedStats[category];
-        }
-        this._aggregatedStats[this.category().name] = (this._aggregatedStats[this.category().name] || 0) + this._selfTime;
-    },
-
-    /**
-     * @return {!Object.<string, number>}
-     */
-    aggregatedStats: function()
-    {
-        return this._aggregatedStats;
-    },
-
-    /**
-     * @param {string} message
-     */
-    addWarning: function(message)
-    {
-        if (!this._warnings)
-            this._warnings = [];
-        this._warnings.push(message);
-    },
-
-    /**
-     * @return {?Array.<string>}
-     */
-    warnings: function()
-    {
-        return this._warnings;
-    },
-
-    /**
-     * @param {!RegExp} regExp
-     * @return {boolean}
-     */
-    testContentMatching: function(regExp)
-    {
-        var tokens = [this.title()];
-        for (var key in this._record.data)
-            tokens.push(this._record.data[key])
-        return regExp.test(tokens.join("|"));
-    }
-}
-
-/**
- * @constructor
  */
 WebInspector.TimelineModel.Filter = function()
 {
     /** @type {!WebInspector.TimelineModel} */
     this._model;
 }
 
 WebInspector.TimelineModel.Filter.prototype = {
     /**
      * @param {!WebInspector.TimelineModel.Record} record
      * @return {boolean}
      */
     accept: function(record)
     {
         return true;
     },
 
     notifyFilterChanged: function()
     {
         this._model._filterChanged();
     }
 }
 
 /**
  * @constructor
- * @implements {WebInspector.OutputStream}
- * @param {!WebInspector.TimelineModel} model
- * @param {!{cancel: function()}} reader
- * @param {!WebInspector.Progress} progress
- */
-WebInspector.TimelineModelLoader = function(model, reader, progress)
-{
-    this._model = model;
-    this._reader = reader;
-    this._progress = progress;
-    this._buffer = "";
-    this._firstChunk = true;
-}
-
-WebInspector.TimelineModelLoader.prototype = {
-    /**
-     * @param {string} chunk
-     */
-    write: function(chunk)
-    {
-        var data = this._buffer + chunk;
-        var lastIndex = 0;
-        var index;
-        do {
-            index = lastIndex;
-            lastIndex = WebInspector.TextUtils.findBalancedCurlyBrackets(data, index);
-        } while (lastIndex !== -1)
-
-        var json = data.slice(0, index) + "]";
-        this._buffer = data.slice(index);
-
-        if (!index)
-            return;
-
-        // Prepending "0" to turn string into valid JSON.
-        if (!this._firstChunk)
-            json = "[0" + json;
-
-        var items;
-        try {
-            items = /** @type {!Array.<!TimelineAgent.TimelineEvent>} */ (JSON.parse(json));
-        } catch (e) {
-            WebInspector.messageSink.addErrorMessage("Malformed timeline data.", true);
-            this._model.reset();
-            this._reader.cancel();
-            this._progress.done();
-            return;
-        }
-
-        if (this._firstChunk) {
-            this._version = items[0];
-            this._firstChunk = false;
-            this._model.reset();
-        }
-
-        // Skip 0-th element - it is either version or 0.
-        for (var i = 1, size = items.length; i < size; ++i)
-            this._model._addRecord(items[i]);
-    },
-
-    close: function()
-    {
-        this._model._loadedFromFile = true;
-    }
-}
-
-/**
- * @constructor
- * @implements {WebInspector.OutputStreamDelegate}
- * @param {!WebInspector.TimelineModel} model
- * @param {!WebInspector.Progress} progress
- */
-WebInspector.TimelineModelLoadFromFileDelegate = function(model, progress)
-{
-    this._model = model;
-    this._progress = progress;
-}
-
-WebInspector.TimelineModelLoadFromFileDelegate.prototype = {
-    onTransferStarted: function()
-    {
-        this._progress.setTitle(WebInspector.UIString("Loading\u2026"));
-    },
-
-    /**
-     * @param {!WebInspector.ChunkedReader} reader
-     */
-    onChunkTransferred: function(reader)
-    {
-        if (this._progress.isCanceled()) {
-            reader.cancel();
-            this._progress.done();
-            this._model.reset();
-            return;
-        }
-
-        var totalSize = reader.fileSize();
-        if (totalSize) {
-            this._progress.setTotalWork(totalSize);
-            this._progress.setWorked(reader.loadedSize());
-        }
-    },
-
-    onTransferFinished: function()
-    {
-        this._progress.done();
-    },
-
-    /**
-     * @param {!WebInspector.ChunkedReader} reader
-     * @param {!Event} event
-     */
-    onError: function(reader, event)
-    {
-        this._progress.done();
-        this._model.reset();
-        switch (event.target.error.code) {
-        case FileError.NOT_FOUND_ERR:
-            WebInspector.messageSink.addErrorMessage(WebInspector.UIString("File \"%s\" not found.", reader.fileName()), true);
-            break;
-        case FileError.NOT_READABLE_ERR:
-            WebInspector.messageSink.addErrorMessage(WebInspector.UIString("File \"%s\" is not readable", reader.fileName()), true);
-            break;
-        case FileError.ABORT_ERR:
-            break;
-        default:
-            WebInspector.messageSink.addErrorMessage(WebInspector.UIString("An error occurred while reading the file \"%s\"", reader.fileName()), true);
-        }
-    }
-}
-
-/**
- * @constructor
- * @param {!WebInspector.OutputStream} stream
- */
-WebInspector.TimelineSaver = function(stream)
-{
-    this._stream = stream;
-}
-
-WebInspector.TimelineSaver.prototype = {
-    /**
-     * @param {!Array.<*>} payloads
-     * @param {string} version
-     */
-    save: function(payloads, version)
-    {
-        this._payloads = payloads;
-        this._recordIndex = 0;
-        this._prologue = "[" + JSON.stringify(version);
-
-        this._writeNextChunk(this._stream);
-    },
-
-    _writeNextChunk: function(stream)
-    {
-        const separator = ",\n";
-        var data = [];
-        var length = 0;
-
-        if (this._prologue) {
-            data.push(this._prologue);
-            length += this._prologue.length;
-            delete this._prologue;
-        } else {
-            if (this._recordIndex === this._payloads.length) {
-                stream.close();
-                return;
-            }
-            data.push("");
-        }
-        while (this._recordIndex < this._payloads.length) {
-            var item = JSON.stringify(this._payloads[this._recordIndex]);
-            var itemLength = item.length + separator.length;
-            if (length + itemLength > WebInspector.TimelineModel.TransferChunkLengthBytes)
-                break;
-            length += itemLength;
-            data.push(item);
-            ++this._recordIndex;
-        }
-        if (this._recordIndex === this._payloads.length)
-            data.push(data.pop() + "]");
-        stream.write(data.join(separator), this._writeNextChunk.bind(this));
-    }
-}
-
-/**
- * @constructor
  */
 WebInspector.TimelineMergingRecordBuffer = function()
 {
     this._backgroundRecordsBuffer = [];
 }
 
 /**
  * @constructor
  */
 WebInspector.TimelineMergingRecordBuffer.prototype = {
@@ skipping 15 matching lines @@
         function recordTimestampComparator(a, b)
         {
             // Never return 0, as the merge function will squash identical entries.
             return a.startTime() < b.startTime() ? -1 : 1;
         }
         var result = this._backgroundRecordsBuffer.mergeOrdered(records, recordTimestampComparator);
         this._backgroundRecordsBuffer = [];
         return result;
     }
 }