DevTools: move tracing based Timeline out of experiment

LayoutTests/http/tests/inspector/timeline-xhr-event-expected.txt

Index: LayoutTests/http/tests/inspector/timeline-xhr-event-expected.txt
diff --git a/LayoutTests/http/tests/inspector/timeline-xhr-event-expected.txt b/LayoutTests/http/tests/inspector/timeline-xhr-event-expected.txt
index 94df819f3b0d8476845571c6e620023fc47da63c..c56cf2fdb952416fec1455234403a17dd5ea0333 100644
--- a/LayoutTests/http/tests/inspector/timeline-xhr-event-expected.txt
+++ b/LayoutTests/http/tests/inspector/timeline-xhr-event-expected.txt
@@ -2,8 +2,23 @@ Tests the Timeline events for XMLHttpReqeust
 
 XHRReadyStateChange Properties:
 {
+    data : {
+        frame : <string>
+        readyState : 1
+        url : .../inspector/network/resources/resource.php
+    }
+    endTime : <number>
+    frameId : <string>
+    stackTrace : <object>
+    startTime : <number>
+    thread : <string>
+    type : "XHRReadyStateChange"
+}
+XHRReadyStateChange Properties:
+{
     children : <object>
     data : {
+        frame : <string>
         readyState : 2
         url : .../inspector/network/resources/resource.php
     }
@@ -17,6 +32,7 @@ XHRReadyStateChange Properties:
 {
     children : <object>
     data : {
+        frame : <string>
         readyState : 3
         url : .../inspector/network/resources/resource.php
     }
@@ -30,6 +46,7 @@ XHRReadyStateChange Properties:
 {
     children : <object>
     data : {
+        frame : <string>
         readyState : 4
         url : .../inspector/network/resources/resource.php
     }
@@ -43,6 +60,7 @@ XHRLoad Properties:
 {
     children : <object>
     data : {
+        frame : <string>
         url : .../inspector/network/resources/resource.php
     }
     endTime : <number>