Move the user interaction policy for FirstMeaningfulPaint UMA into renderer

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

Index: third_party/WebKit/Source/core/paint/PaintTiming.h
diff --git a/third_party/WebKit/Source/core/paint/PaintTiming.h b/third_party/WebKit/Source/core/paint/PaintTiming.h
index a9105d58ed9f5b87bb012b428be2086c9f5cbd23..23efa95f5e3bede8eb3034fe921e0125194b5bf8 100644
--- a/third_party/WebKit/Source/core/paint/PaintTiming.h
+++ b/third_party/WebKit/Source/core/paint/PaintTiming.h
@@ -50,7 +50,7 @@ class CORE_EXPORT PaintTiming final
   void MarkFirstImagePaint();
 
   void SetFirstMeaningfulPaintCandidate(double timestamp);
-  void SetFirstMeaningfulPaint(double stamp);
+  void SetFirstMeaningfulPaint(double stamp, bool was_after_user_input);

[kinuko, 2017/06/14 07:58:41]

nit: can we use enum over bool?  (Maybe define it in FMPDetector and use it
throughout in blink code?) 

[Kunihiko Sakamoto, 2017/06/15 03:53:57]

Done.

   void NotifyPaint(bool is_first_paint, bool text_painted, bool image_painted);
 
   // The getters below return monotonically-increasing seconds, or zero if the
@@ -110,6 +110,7 @@ class CORE_EXPORT PaintTiming final
   void SetFirstContentfulPaint(double stamp);
 
   void RegisterNotifySwapTime(PaintEvent);
+  void ReportUserInputHistogram(bool had_input);
 
   double first_paint_ = 0.0;
   double first_paint_swap_ = 0.0;