Add workerStart attribute to ResourceTiming

Source/core/timing/PerformanceResourceTiming.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2012 Intel 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.
@@ skipping 51 matching lines @@
 
 PerformanceResourceTiming::~PerformanceResourceTiming()
 {
 }
 
 AtomicString PerformanceResourceTiming::initiatorType() const
 {
     return m_initiatorType;
 }
 
+double PerformanceResourceTiming::workerStart() const
+{
+    if (!m_timing || m_timing->workerStart() == 0.0)
+        return 0.0;
+
+    return monotonicTimeToDocumentMilliseconds(m_requestingDocument.get(), m_timing->workerStart());
+}
+
 double PerformanceResourceTiming::redirectStart() const
 {
     if (!m_lastRedirectEndTime || !m_allowRedirectDetails)
         return 0.0;
 
+    if (double workerStartTime = workerStart())
+        return workerStartTime;
+
     return PerformanceEntry::startTime();
 }
 
 double PerformanceResourceTiming::redirectEnd() const
 {
     if (!m_lastRedirectEndTime || !m_allowRedirectDetails)
         return 0.0;
 
     return monotonicTimeToDocumentMilliseconds(m_requestingDocument.get(), m_lastRedirectEndTime);
 }
 
 double PerformanceResourceTiming::fetchStart() const
 {
     if (m_lastRedirectEndTime) {
         // FIXME: ASSERT(m_timing) should be in constructor once timeticks of
         // AppCache is exposed from chrome network stack, crbug/251100
         ASSERT(m_timing);
         return monotonicTimeToDocumentMilliseconds(m_requestingDocument.get(), m_timing->requestTime());
     }
 
+    if (double workerStartTime = workerStart())
+        return workerStartTime;
+
     return PerformanceEntry::startTime();
 }
 
 double PerformanceResourceTiming::domainLookupStart() const
 {
     if (!m_allowTimingDetails)
         return 0.0;
 
     if (!m_timing || m_timing->dnsStart() == 0.0)
         return fetchStart();
@@ skipping 83 matching lines @@
     return monotonicTimeToDocumentMilliseconds(m_requestingDocument.get(), m_finishTime);
 }
 
 DEFINE_TRACE(PerformanceResourceTiming)
 {
     visitor->trace(m_requestingDocument);
     PerformanceEntry::trace(visitor);
 }
 
 } // namespace blink