Implement DataCue interface.

Source/core/html/track/DataCue.idl

Index: Source/core/html/track/DataCue.idl
diff --git a/Source/modules/performance/SharedWorkerPerformance.idl b/Source/core/html/track/DataCue.idl
similarity index 80%
copy from Source/modules/performance/SharedWorkerPerformance.idl
copy to Source/core/html/track/DataCue.idl
index ef8b36b7ab02a2031941fa78f1c810a734b3951b..489c22392c111ec9904499297d2ed138ead627b0 100644
--- a/Source/modules/performance/SharedWorkerPerformance.idl
+++ b/Source/core/html/track/DataCue.idl
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014, Opera Software ASA. All rights reserved.
+ * Copyright (c) 2014, CableLabs Inc. All rights reserved.

[acolwell GONE FROM CHROMIUM, 2014/04/04 23:25:27]

nit: This should use the Chromium header in the Blink style guide.

  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -28,8 +28,10 @@
  */
 
 [
-    RuntimeEnabled=HighResolutionTimeInWorkers,
-] partial interface SharedWorker {
-    // See https://dvcs.w3.org/hg/webperf/raw-file/tip/specs/HighResolutionTime2/Overview.html for details.
-    [CallWith=ExecutionContext] readonly attribute double workerStart;
+    Constructor(double startTime, double endTime, [StrictTypeChecking] ArrayBuffer data),
+    ConstructorCallWith=ExecutionContext,
+    RaisesException=Constructor,
+] interface DataCue : TextTrackCue {
+    [RaisesException=Setter] attribute ArrayBuffer data;
+    readonly attribute DOMString? text;
 };