DevTools: switch Timeline frontend into buffered mode and remove the corresponding experiment.

LayoutTests/inspector/timeline/timeline-timer-fired-from-eval-call-site.html

Index: LayoutTests/inspector/timeline/timeline-timer-fired-from-eval-call-site.html
diff --git a/LayoutTests/inspector/timeline/timeline-timer-fired-from-eval-call-site.html b/LayoutTests/inspector/timeline/timeline-timer-fired-from-eval-call-site.html
index 68b022bae6bfc0728fdfb99d7fbb1e2c73387044..9efdb175fa8ce6758f22deabf9beb8a4bb274144 100644
--- a/LayoutTests/inspector/timeline/timeline-timer-fired-from-eval-call-site.html
+++ b/LayoutTests/inspector/timeline/timeline-timer-fired-from-eval-call-site.html
@@ -4,13 +4,20 @@
 <script src="../../http/tests/inspector/timeline-test.js"></script>
 <script>
 
-function performActions()
+function performActions(callback)
 {
+    window.callWhenDone = callback;
     var content = "" + 
-        "var fn2 = function() {console.markTimeline(\"Script evaluated\");};\\n" +
-        "var fn1 = function() {window.setTimeout(fn2, 1);};\\n" +
-        "window.setTimeout(fn1, 1);\\n"
-    content = "eval('" + content + "//# sourceURL=fromEval.js" + "');";
+        "var fn2 = function() {" +
+        "    console.markTimeline(\"Script evaluated\");" +
+        "    window.callWhenDone();" +
+        "};\\n" +
+        "var fn1 = function() {" +
+        "    window.setTimeout(fn2, 1);" +
+        "};\\n" +
+        "window.setTimeout(fn1, 1);\\n" +
+        "//# sourceURL=fromEval.js";
+    content = "eval('" + content + "');";
     var scriptElement = document.createElement('script');
     var contentNode = document.createTextNode(content);
     scriptElement.appendChild(contentNode);
@@ -20,13 +27,7 @@ function performActions()
 
 function test()
 {
-    InspectorTest.startTimeline(start);
-    InspectorTest.waitForRecordType("TimeStamp", finish);
-
-    function start()
-    {
-        InspectorTest.evaluateInPage("performActions()");
-    }
+    InspectorTest.invokeAsyncWithTimeline("performActions", finish);
 
     function finish()
     {