Expose Resource Timing methods and attribute in workers

Source/core/timing/WorkerPerformance.idl

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 21 matching lines @@
     GarbageCollected,
     NoInterfaceObject
 ] interface WorkerPerformance : EventTarget {
     // See https://dvcs.w3.org/hg/webperf/raw-file/tip/specs/HighResolutionTime2/Overview.html for details.
     double now();
 
     [RuntimeEnabled=ServiceWorkerPerformanceTimeline] sequence<PerformanceEntry> getEntries();
     [RuntimeEnabled=ServiceWorkerPerformanceTimeline] sequence<PerformanceEntry> getEntriesByType(DOMString entryType);
     [RuntimeEnabled=ServiceWorkerPerformanceTimeline] sequence<PerformanceEntry> getEntriesByName(DOMString name, optional DOMString entryType = null);
 
-    // TODO(ksakamoto): Add Resource Timing methods and attributes. crbug.com/465641
+    // See http://www.w3.org/TR/resource-timing/
+    [RuntimeEnabled=ServiceWorkerPerformanceTimeline, MeasureAs=PrefixedPerformanceClearResourceTimings] void webkitClearResourceTimings();

[tkent, 2015/06/24 07:12:00]

It's unfortunate to ship new prefixed functions...  But we don't have unprefixed
versions.

+    [RuntimeEnabled=ServiceWorkerPerformanceTimeline, MeasureAs=PrefixedPerformanceSetResourceTimingBufferSize] void webkitSetResourceTimingBufferSize(unsigned long maxSize);
+    [RuntimeEnabled=ServiceWorkerPerformanceTimeline] attribute EventHandler onwebkitresourcetimingbufferfull;
 
     // See http://www.w3.org/TR/2012/CR-user-timing-20120726/
     [RuntimeEnabled=ServiceWorkerPerformanceTimeline, RaisesException] void mark(DOMString markName);
     [RuntimeEnabled=ServiceWorkerPerformanceTimeline] void clearMarks(optional DOMString markName = null);
 
     [RuntimeEnabled=ServiceWorkerPerformanceTimeline, RaisesException] void measure(DOMString measureName, optional DOMString startMark = null, optional DOMString endMark = null);
     [RuntimeEnabled=ServiceWorkerPerformanceTimeline] void clearMeasures(optional DOMString measureName = null);
 
     [RuntimeEnabled=MemoryInfoInWorkers] readonly attribute MemoryInfo memory;
 };