First version of PerformanceObserver

Source/core/timing/PerformanceUserTiming.cpp

Index: Source/core/timing/PerformanceUserTiming.cpp
diff --git a/Source/core/timing/PerformanceUserTiming.cpp b/Source/core/timing/PerformanceUserTiming.cpp
index 94121ab0bc87d5577e47c42c2a6e9690b5f44497..0d3790aae293b924e5302c82cd47be2ffa8949ca 100644
--- a/Source/core/timing/PerformanceUserTiming.cpp
+++ b/Source/core/timing/PerformanceUserTiming.cpp
@@ -81,8 +81,9 @@ UserTiming::UserTiming(PerformanceBase* performance)
 {
 }
 
-static void insertPerformanceEntry(PerformanceEntryMap& performanceEntryMap, PerformanceEntry* entry)
+static void insertPerformanceEntry(PerformanceEntryMap& performanceEntryMap, NewPerformanceEntryCallback callback, PerformanceEntry* entry)
 {
+    (*callback)(entry);

[esprehn, 2015/07/18 22:24:17]

This is very unusual for blink code, can you return an iterator instead?

     PerformanceEntryMap::iterator it = performanceEntryMap.find(entry->name());
     if (it != performanceEntryMap.end())
         it->value.append(entry);
@@ -104,7 +105,7 @@ static void clearPeformanceEntries(PerformanceEntryMap& performanceEntryMap, con
         performanceEntryMap.remove(name);
 }
 
-void UserTiming::mark(const String& markName, ExceptionState& exceptionState)
+void UserTiming::mark(const String& markName, NewPerformanceEntryCallback callback, ExceptionState& exceptionState)
 {
     if (restrictedKeyMap().contains(markName)) {
         exceptionState.throwDOMException(SyntaxError, "'" + markName + "' is part of the PerformanceTiming interface, and cannot be used as a mark name.");
@@ -113,7 +114,7 @@ void UserTiming::mark(const String& markName, ExceptionState& exceptionState)
 
     TRACE_EVENT_COPY_MARK("blink.user_timing", markName.utf8().data());
     double startTime = m_performance->now();
-    insertPerformanceEntry(m_marksMap, PerformanceMark::create(markName, startTime));
+    insertPerformanceEntry(m_marksMap, callback, PerformanceMark::create(markName, startTime));
     Platform::current()->histogramCustomCounts("PLT.UserTiming_Mark", static_cast<int>(startTime), 0, 600000, 100);
 }
 
@@ -140,7 +141,7 @@ double UserTiming::findExistingMarkStartTime(const String& markName, ExceptionSt
     return 0.0;
 }
 
-void UserTiming::measure(const String& measureName, const String& startMark, const String& endMark, ExceptionState& exceptionState)
+void UserTiming::measure(const String& measureName, const String& startMark, const String& endMark, NewPerformanceEntryCallback callback, ExceptionState& exceptionState)
 {
     double startTime = 0.0;
     double endTime = 0.0;
@@ -170,7 +171,7 @@ void UserTiming::measure(const String& measureName, const String& startMark, con
     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);
 
-    insertPerformanceEntry(m_measuresMap, PerformanceMeasure::create(measureName, startTime, endTime));
+    insertPerformanceEntry(m_measuresMap, callback, PerformanceMeasure::create(measureName, startTime, endTime));
     if (endTime >= startTime)
         Platform::current()->histogramCustomCounts("PLT.UserTiming_MeasureDuration", static_cast<int>(endTime - startTime), 0, 600000, 100);
 }