FirstMeaningfulPaint UMA

third_party/WebKit/Source/core/paint/PaintTiming.cpp

Index: third_party/WebKit/Source/core/paint/PaintTiming.cpp
diff --git a/third_party/WebKit/Source/core/paint/PaintTiming.cpp b/third_party/WebKit/Source/core/paint/PaintTiming.cpp
index 87fc0e0dae31f3df7473efb3b60830bfb4865839..664778ccb07b54839c427467cd37d32fdaedfc76 100644
--- a/third_party/WebKit/Source/core/paint/PaintTiming.cpp
+++ b/third_party/WebKit/Source/core/paint/PaintTiming.cpp
@@ -65,14 +65,23 @@ void PaintTiming::markFirstImagePaint()
     notifyPaintTimingChanged();
 }
 
+void PaintTiming::setFirstMeaningfulPaint(double stamp)
+{
+    DCHECK_EQ(m_firstMeaningfulPaint, 0.0);
+    m_firstMeaningfulPaint = stamp;
+    notifyPaintTimingChanged();
+}
+
 DEFINE_TRACE(PaintTiming)
 {
     visitor->trace(m_document);
+    visitor->trace(m_fmpDetector);
     Supplement<Document>::trace(visitor);
 }
 
 PaintTiming::PaintTiming(Document& document)
     : m_document(document)
+    , m_fmpDetector(new FirstMeaningfulPaintDetector(this))
 {
 }