Added UMA instrumentation for site-instrumented user timing marks and measures

Source/core/page/PerformanceUserTiming.cpp

 /*
  * 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 13 matching lines @@
  */
 
 #include "config.h"
 #include "core/page/PerformanceUserTiming.h"
 
 #include "bindings/v8/ExceptionState.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/page/Performance.h"
 #include "core/page/PerformanceMark.h"
 #include "core/page/PerformanceMeasure.h"
+#include "core/platform/HistogramSupport.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
 namespace {
 
 typedef HashMap<String, NavigationTimingFunction> RestrictedKeyMap;
 static RestrictedKeyMap restrictedKeyMap()
 {
     DEFINE_STATIC_LOCAL(RestrictedKeyMap, map, ());
@@ skipping 56 matching lines @@
 
 void UserTiming::mark(const String& markName, ExceptionState& es)
 {
     if (restrictedKeyMap().contains(markName)) {
         es.throwDOMException(SyntaxError, "'" + markName + "' is part of the PerformanceTiming interface, and cannot be used as a mark name.");
         return;
     }
 
     double startTime = m_performance->now();
     insertPerformanceEntry(m_marksMap, PerformanceMark::create(markName, startTime));
+    HistogramSupport::histogramCustomCounts("PLT.UserTiming_Mark", static_cast<int>(startTime), 0, 600000, 100);
 }
 
 void UserTiming::clearMarks(const String& markName)
 {
     clearPeformanceEntries(m_marksMap, markName);
 }
 
 double UserTiming::findExistingMarkStartTime(const String& markName, ExceptionState& es)
 {
     if (m_marksMap.contains(markName))
@@ skipping 27 matching lines @@
     } else {
         endTime = findExistingMarkStartTime(endMark, es);
         if (es.hadException())
             return;
         startTime = findExistingMarkStartTime(startMark, es);
         if (es.hadException())
             return;
     }
 
     insertPerformanceEntry(m_measuresMap, PerformanceMeasure::create(measureName, startTime, endTime));
+    if (endTime >= startTime)
+        HistogramSupport::histogramCustomCounts("PLT.UserTiming_MeasureDuration", static_cast<int>(endTime - startTime), 0, 600000, 100);
 }
 
 void UserTiming::clearMeasures(const String& measureName)
 {
     clearPeformanceEntries(m_measuresMap, measureName);
 }
 
 static Vector<RefPtr<PerformanceEntry> > convertToEntrySequence(const PerformanceEntryMap& performanceEntryMap)
 {
     Vector<RefPtr<PerformanceEntry> > entries;
@@ skipping 29 matching lines @@
 {
     return convertToEntrySequence(m_measuresMap);
 }
 
 Vector<RefPtr<PerformanceEntry> > UserTiming::getMeasures(const String& name) const
 {
     return getEntrySequenceByName(m_measuresMap, name);
 }
 
 } // namespace WebCore