Timeline AddTraceProvider API

third_party/WebKit/Source/devtools/front_end/timeline/TimelineController.js

Index: third_party/WebKit/Source/devtools/front_end/timeline/TimelineController.js
diff --git a/third_party/WebKit/Source/devtools/front_end/timeline/TimelineController.js b/third_party/WebKit/Source/devtools/front_end/timeline/TimelineController.js
index 3ce1bc2a3b2d5eb85e22af33d1ca022a59eb61d4..8f6c6a3b9b0f0ded8d9194997eeda18e73960532 100644
--- a/third_party/WebKit/Source/devtools/front_end/timeline/TimelineController.js
+++ b/third_party/WebKit/Source/devtools/front_end/timeline/TimelineController.js
@@ -31,6 +31,8 @@ WebInspector.TimelineController.prototype = {
      */
     startRecording: function(captureCauses, enableJSSampling, captureMemory, capturePictures, captureFilmStrip)
     {
+        this._extensionTraceProviders = WebInspector.extensionServer.traceProviders().slice();
+
         function disabledByDefault(category)
         {
             return "disabled-by-default-" + category;
@@ -67,6 +69,9 @@ WebInspector.TimelineController.prototype = {
         if (captureFilmStrip)
             categoriesArray.push(disabledByDefault("devtools.screenshot"));
 
+        for (var traceProvider of this._extensionTraceProviders)
+            traceProvider.run();

[caseq, 2016/07/19 22:01:17]

rename from run() to start()?

+
         var categories = categoriesArray.join(",");
         this._startRecordingWithCategories(categories, enableJSSampling);
     },
@@ -77,6 +82,10 @@ WebInspector.TimelineController.prototype = {
         this._target.tracingManager.stop();
         this._targetsResumedPromise = WebInspector.targetManager.resumeAllTargets();
         this._delegate.loadingStarted();
+
+        var target = WebInspector.targetManager.mainTarget();

[caseq, 2016/07/19 22:01:17]

unused?

+        for (var traceProvider of this._extensionTraceProviders)
+            traceProvider.stop();
     },
 
     /**