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..3836bb77600ac7d69daa16f0cfca0a0dcdb184c4 100644
--- a/third_party/WebKit/Source/devtools/front_end/timeline/TimelineController.js
+++ b/third_party/WebKit/Source/devtools/front_end/timeline/TimelineController.js
@@ -18,6 +18,7 @@ WebInspector.TimelineController = function(target, delegate, tracingModel)
     this._targets = [];
     this._allProfilesStoppedPromise = Promise.resolve();
     this._targetsResumedPromise = Promise.resolve();
+    this._extensionTraceProviders = WebInspector.extensionServer.traceProviders();
     WebInspector.targetManager.observeTargets(this);
 }
 
@@ -67,6 +68,10 @@ WebInspector.TimelineController.prototype = {
         if (captureFilmStrip)
             categoriesArray.push(disabledByDefault("devtools.screenshot"));
 
+        for (var traceProvider of this._extensionTraceProviders) {

[caseq, 2016/07/08 00:57:49]

nit: drop redundant {}

+            traceProvider.run();
+        }
+
         var categories = categoriesArray.join(",");
         this._startRecordingWithCategories(categories, enableJSSampling);
     },
@@ -77,6 +82,12 @@ WebInspector.TimelineController.prototype = {
         this._target.tracingManager.stop();
         this._targetsResumedPromise = WebInspector.targetManager.resumeAllTargets();
         this._delegate.loadingStarted();
+
+        var target = WebInspector.targetManager.mainTarget();
+        var requests = target.networkLog.requests().slice();

[caseq, 2016/07/08 00:57:49]

Why are we doing this? This does not look good.

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