Timeline addTraceProvider API

third_party/WebKit/Source/devtools/front_end/timeline_model/TimelineModel.js

Index: third_party/WebKit/Source/devtools/front_end/timeline_model/TimelineModel.js
diff --git a/third_party/WebKit/Source/devtools/front_end/timeline_model/TimelineModel.js b/third_party/WebKit/Source/devtools/front_end/timeline_model/TimelineModel.js
index 08ff67151f025d211a62d9d39822a6d4a9700d57..10aa475cb74ef051c3fc4480dc49bbf98f82b179 100644
--- a/third_party/WebKit/Source/devtools/front_end/timeline_model/TimelineModel.js
+++ b/third_party/WebKit/Source/devtools/front_end/timeline_model/TimelineModel.js
@@ -160,7 +160,9 @@ WebInspector.TimelineModel.RecordType = {
 
     // CpuProfile is a virtual event created on frontend to support
     // serialization of CPU Profiles within tracing timeline data.
-    CpuProfile: "CpuProfile"
+    CpuProfile: "CpuProfile",
+
+    Extension: "Extension"

[caseq, 2016/07/11 18:58:38]

This shouldn't be necessary.

 }
 
 WebInspector.TimelineModel.Category = {
@@ -180,6 +182,7 @@ WebInspector.TimelineModel.WarningType = {
 }
 
 WebInspector.TimelineModel.MainThreadName = "main";
+WebInspector.TimelineModel.ExtensionThreadName = "extension";

[caseq, 2016/07/11 18:58:38]

ditto.

 WebInspector.TimelineModel.WorkerThreadName = "DedicatedWorker Thread";
 WebInspector.TimelineModel.RendererMainThreadName = "CrRendererMain";
 
@@ -481,9 +484,10 @@ WebInspector.TimelineModel.prototype = {
 
     /**
      * @param {!WebInspector.TracingModel} tracingModel
+     * @param {!Array.<!WebInspector.ExtensionTraceProvider>} traceProviders
      * @param {boolean=} produceTraceStartedInPage
      */
-    setEvents: function(tracingModel, produceTraceStartedInPage)
+    setEvents: function(tracingModel, traceProviders, produceTraceStartedInPage)
     {
         this.reset();
         this._resetProcessingState();
@@ -508,6 +512,7 @@ WebInspector.TimelineModel.prototype = {
         this._inspectedTargetEvents.sort(WebInspector.TracingModel.Event.compareStartTime);
 
         this._processBrowserEvents(tracingModel);
+        this._processExtensionEvents(traceProviders);
         this._buildTimelineRecords();
         this._buildGPUEvents(tracingModel);
         this._insertFirstPaintEvent();
@@ -628,6 +633,18 @@ WebInspector.TimelineModel.prototype = {
         this._mergeAsyncEvents(this._mainThreadAsyncEventsByGroup, asyncEventsByGroup);
     },
 
+    /**
+     * @param {!Array.<!WebInspector.ExtensionTraceProvider>} traceProviders
+     */
+    _processExtensionEvents: function(traceProviders)
+    {
+        for (var traceProvider of traceProviders) {
+            traceProvider.tracingModel.threadByName("Extension", "Thread 0").events().forEach(function(entry) {
+                this._extensionEvents.push(entry);
+            }, this);
+        }
+    },
+
     _buildTimelineRecords: function()
     {
         var topLevelRecords = this._buildTimelineRecordsForThread(this.mainThreadEvents());
@@ -1075,6 +1092,8 @@ WebInspector.TimelineModel.prototype = {
         this._virtualThreads = [];
         /** @type {!Array<!WebInspector.TracingModel.Event>} */
         this._mainThreadEvents = [];
+        /** @type {!Array<!WebInspector.TracingModel.Event>} */
+        this._extensionEvents = [];
         /** @type {!Map<!WebInspector.TimelineModel.AsyncEventGroup, !Array<!WebInspector.TracingModel.AsyncEvent>>} */
         this._mainThreadAsyncEventsByGroup = new Map();
         /** @type {!Array<!WebInspector.TracingModel.Event>} */
@@ -1130,6 +1149,14 @@ WebInspector.TimelineModel.prototype = {
     },
 
     /**
+     * @return {!Array.<!WebInspector.TracingModel.Event>}
+     */
+    extensionEvents: function()
+    {
+        return this._extensionEvents;
+    },
+
+    /**
      * @param {!Array.<!WebInspector.TracingModel.Event>} events
      */
     _setMainThreadEvents: function(events)