DevTools: adopt existing Timeline tests for tracing based Timeline

LayoutTests/inspector/tracing/timeline-time-stamp-expected.txt

Index: LayoutTests/inspector/tracing/timeline-time-stamp-expected.txt
diff --git a/LayoutTests/inspector/timeline/timeline-time-stamp-expected.txt b/LayoutTests/inspector/tracing/timeline-time-stamp-expected.txt
similarity index 89%
copy from LayoutTests/inspector/timeline/timeline-time-stamp-expected.txt
copy to LayoutTests/inspector/tracing/timeline-time-stamp-expected.txt
index d2b19bbbc398e427180404a1a47811e961b6524b..0ae26b45c04e62f18164bf5f665b99c2eaf80f2e 100644
--- a/LayoutTests/inspector/timeline/timeline-time-stamp-expected.txt
+++ b/LayoutTests/inspector/tracing/timeline-time-stamp-expected.txt
@@ -3,11 +3,11 @@ Tests the Timeline API timeStamp feature
 TimeStamp Properties:
 {
     data : {
+        frame : <string>
         message : "TIME STAMP"
     }
     endTime : <number>
     frameId : <string>
-    stackTrace : <object>
     startTime : <number>
     thread : <string>
     type : "TimeStamp"
@@ -16,11 +16,11 @@ Timestamp records:
 TimeStamp Properties:
 {
     data : {
+        frame : <string>
         message : "TIME STAMP"
     }
     endTime : <number>
     frameId : <string>
-    stackTrace : <object>
     startTime : <number>
     thread : <string>
     type : "TimeStamp"