Move the user interaction policy for FirstMeaningfulPaint UMA into renderer

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

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef PaintTiming_h
 #define PaintTiming_h
 
 #include "core/dom/Document.h"
 #include "core/paint/FirstMeaningfulPaintDetector.h"
 #include "platform/Supplementable.h"
@@ skipping 32 matching lines @@
   // markFirstTextPaint, markFirstImagePaint, and markFirstContentfulPaint
   // will also record first paint if first paint hasn't been recorded yet.
   void MarkFirstContentfulPaint();
 
   // markFirstTextPaint and markFirstImagePaint will also record first
   // contentful paint if first contentful paint hasn't been recorded yet.
   void MarkFirstTextPaint();
   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
   // given paint event has not yet occurred. See the comments for
   // monotonicallyIncreasingTime in wtf/CurrentTime.h for additional details.
 
   // firstPaint returns the first time that anything was painted for the
   // current document.
   double FirstPaint() const { return first_paint_; }
 
@@ skipping 39 matching lines @@
   // mark*() or set*() methods to make sure that first paint is marked as part
   // of marking first contentful paint, or that first contentful paint is
   // marked as part of marking first text/image paint, for example.
   void SetFirstPaint(double stamp);
 
   // setFirstContentfulPaint will also set first paint time if first paint
   // time has not yet been recorded.
   void SetFirstContentfulPaint(double stamp);
 
   void RegisterNotifySwapTime(PaintEvent);
+  void ReportUserInputHistogram(bool had_input);
 
   double first_paint_ = 0.0;
   double first_paint_swap_ = 0.0;
   double first_text_paint_ = 0.0;
   double first_image_paint_ = 0.0;
   double first_contentful_paint_ = 0.0;
   double first_contentful_paint_swap_ = 0.0;
   double first_meaningful_paint_ = 0.0;
   double first_meaningful_paint_swap_ = 0.0;
   double first_meaningful_paint_candidate_ = 0.0;
 
   Member<FirstMeaningfulPaintDetector> fmp_detector_;
 };
 
 }  // namespace blink
 
 #endif