Remove custom counts histogram from the blink API.

third_party/WebKit/Source/core/timing/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 12 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "core/timing/PerformanceUserTiming.h"
 
 #include "bindings/core/v8/ExceptionState.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/timing/PerformanceBase.h"
 #include "core/timing/PerformanceMark.h"
 #include "core/timing/PerformanceMeasure.h"
+#include "platform/Histogram.h"
 #include "platform/TraceEvent.h"
 #include "public/platform/Platform.h"
 #include "wtf/text/StringHash.h"
 
 namespace blink {
 
 namespace {
 
 using RestrictedKeyMap = HashMap<String, NavigationTimingFunction>;
 
@@ skipping 64 matching lines @@
 {
     if (restrictedKeyMap().contains(markName)) {
         exceptionState.throwDOMException(SyntaxError, "'" + markName + "' is part of the PerformanceTiming interface, and cannot be used as a mark name.");
         return nullptr;
     }
 
     TRACE_EVENT_COPY_MARK("blink.user_timing", markName.utf8().data());
     double startTime = m_performance->now();
     PerformanceEntry* entry = PerformanceMark::create(markName, startTime);
     insertPerformanceEntry(m_marksMap, *entry);
-    Platform::current()->histogramCustomCounts("PLT.UserTiming_Mark", static_cast<int>(startTime), 0, 600000, 100);
+    DEFINE_THREAD_SAFE_STATIC_LOCAL(CustomCountHistogram, userTimingMarkHistogram, new CustomCountHistogram("PLT.UserTiming_Mark", 0, 600000, 100));
+    userTimingMarkHistogram.count(static_cast<int>(startTime));
     return entry;
 }
 
 void UserTiming::clearMarks(const String& markName)
 {
     clearPeformanceEntries(m_marksMap, markName);
 }
 
 double UserTiming::findExistingMarkStartTime(const String& markName, ExceptionState& exceptionState)
 {
@@ skipping 38 matching lines @@
     // navigation, whereas trace events accept double seconds based off of
     // CurrentTime::monotonicallyIncreasingTime().
     double startTimeMonotonic = m_performance->timeOrigin() + startTime / 1000.0;
     double endTimeMonotonic = m_performance->timeOrigin() + endTime / 1000.0;
 
     TRACE_EVENT_COPY_NESTABLE_ASYNC_BEGIN_WITH_TIMESTAMP0("blink.user_timing", measureName.utf8().data(), WTF::StringHash::hash(measureName), startTimeMonotonic);
     TRACE_EVENT_COPY_NESTABLE_ASYNC_END_WITH_TIMESTAMP0("blink.user_timing", measureName.utf8().data(), WTF::StringHash::hash(measureName), endTimeMonotonic);
 
     PerformanceEntry* entry = PerformanceMeasure::create(measureName, startTime, endTime);
     insertPerformanceEntry(m_measuresMap, *entry);
-    if (endTime >= startTime)
-        Platform::current()->histogramCustomCounts("PLT.UserTiming_MeasureDuration", static_cast<int>(endTime - startTime), 0, 600000, 100);
+    if (endTime >= startTime) {
+        DEFINE_THREAD_SAFE_STATIC_LOCAL(CustomCountHistogram, measureDurationHistogram, new CustomCountHistogram("PLT.UserTiming_MeasureDuration", 0, 600000, 100));
+        measureDurationHistogram.count(static_cast<int>(endTime - startTime));
+    }
     return entry;
 }
 
 void UserTiming::clearMeasures(const String& measureName)
 {
     clearPeformanceEntries(m_measuresMap, measureName);
 }
 
 static PerformanceEntryVector convertToEntrySequence(const PerformanceEntryMap& performanceEntryMap)
 {
@@ skipping 37 matching lines @@
 }
 
 DEFINE_TRACE(UserTiming)
 {
     visitor->trace(m_performance);
     visitor->trace(m_marksMap);
     visitor->trace(m_measuresMap);
 }
 
 } // namespace blink