Remove some of timeline experiments

LayoutTests/inspector/layers/tracing-layer-tree.html

Index: LayoutTests/inspector/layers/tracing-layer-tree.html
diff --git a/LayoutTests/inspector/layers/tracing-layer-tree.html b/LayoutTests/inspector/layers/tracing-layer-tree.html
index 62895ebb18d31e63afcd295a385282e5a68946c8..9c75dfc74fe8b1b647c486fa788714451c83ce0d 100644
--- a/LayoutTests/inspector/layers/tracing-layer-tree.html
+++ b/LayoutTests/inspector/layers/tracing-layer-tree.html
@@ -25,7 +25,7 @@ function doActions(callback)
 
 function test()
 {
-    InspectorTest.invokeWithTracing(WebInspector.TracingTimelineModel.defaultTracingCategoryFilter, "doActions", onTracingComplete);
+    InspectorTest.invokeWithTracing("doActions", onTracingComplete);
 
     var target = /** @type {!WebInspector.Target} */ (WebInspector.targetManager.activeTarget());
     var layerTree = new WebInspector.TracingLayerTree(target.weakReference());