BlankText UMAs should be reported only for webfonts in block period

third_party/WebKit/Source/core/css/RemoteFontFaceSource.cpp

Index: third_party/WebKit/Source/core/css/RemoteFontFaceSource.cpp
diff --git a/third_party/WebKit/Source/core/css/RemoteFontFaceSource.cpp b/third_party/WebKit/Source/core/css/RemoteFontFaceSource.cpp
index 70f8c19f45897f17eaae0581cb79f818875ac1ce..10b7d91dd921f3a79998fe66f338b18db72dd4c6 100644
--- a/third_party/WebKit/Source/core/css/RemoteFontFaceSource.cpp
+++ b/third_party/WebKit/Source/core/css/RemoteFontFaceSource.cpp
@@ -199,10 +199,10 @@ void RemoteFontFaceSource::FontLoadHistograms::loadStarted()
         m_loadStartTime = currentTimeMS();
 }
 
-void RemoteFontFaceSource::FontLoadHistograms::fallbackFontPainted()
+void RemoteFontFaceSource::FontLoadHistograms::fallbackFontPainted(DisplayPeriod period)
 {
-    if (!m_fallbackPaintTime)
-        m_fallbackPaintTime = currentTimeMS();
+    if (period == BlockPeriod && !m_blankPaintTime)
+        m_blankPaintTime = currentTimeMS();
 }
 
 void RemoteFontFaceSource::FontLoadHistograms::fontLoaded(bool isInterventionTriggered)
@@ -219,12 +219,12 @@ void RemoteFontFaceSource::FontLoadHistograms::longLimitExceeded(bool isInterven
 
 void RemoteFontFaceSource::FontLoadHistograms::recordFallbackTime(const FontResource* font)
 {
-    if (m_fallbackPaintTime <= 0)
+    if (m_blankPaintTime <= 0)
         return;
-    int duration = static_cast<int>(currentTimeMS() - m_fallbackPaintTime);
+    int duration = static_cast<int>(currentTimeMS() - m_blankPaintTime);
     DEFINE_STATIC_LOCAL(CustomCountHistogram, blankTextShownTimeHistogram, ("WebFont.BlankTextShownTime", 0, 10000, 50));
     blankTextShownTimeHistogram.count(duration);
-    m_fallbackPaintTime = -1;
+    m_blankPaintTime = -1;
 }
 
 void RemoteFontFaceSource::FontLoadHistograms::recordRemoteFont(const FontResource* font)