Fix first paint tracking for SPv2

third_party/WebKit/Source/core/frame/FrameView.cpp

Index: third_party/WebKit/Source/core/frame/FrameView.cpp
diff --git a/third_party/WebKit/Source/core/frame/FrameView.cpp b/third_party/WebKit/Source/core/frame/FrameView.cpp
index 20aa9f46aa577f6803618959df897b0057191936..14179308e43dd3af1d6fb11e5119257b470add04 100644
--- a/third_party/WebKit/Source/core/frame/FrameView.cpp
+++ b/third_party/WebKit/Source/core/frame/FrameView.cpp
@@ -94,6 +94,7 @@
 #include "core/page/scrolling/TopDocumentRootScrollerController.h"
 #include "core/paint/FramePainter.h"
 #include "core/paint/PaintLayer.h"
+#include "core/paint/PaintTiming.h"
 #include "core/paint/PrePaintTreeWalk.h"
 #include "core/plugins/PluginView.h"
 #include "core/style/ComputedStyle.h"
@@ -3002,6 +3003,14 @@ void FrameView::prePaint() {
   });
 }
 
+void FrameView::notifyPaint(const PaintController& paintController) const {
+  if (Document* document = m_frame->document()) {
+    PaintTiming::from(*document).notifyPaint(paintController.firstPainted(),
+                                             paintController.textPainted(),
+                                             paintController.imagePainted());
+  }
+}
+
 void FrameView::paintTree() {
   TRACE_EVENT0("blink", "FrameView::paintTree");
   SCOPED_BLINK_UMA_HISTOGRAM_TIMER("Blink.Paint.UpdateTime");
@@ -3020,6 +3029,7 @@ void FrameView::paintTree() {
       GraphicsContext graphicsContext(*m_paintController);
       paint(graphicsContext, CullRect(LayoutRect::infiniteIntRect()));
       m_paintController->commitNewDisplayItems(LayoutSize());
+      notifyPaint(*m_paintController);
     }
   } else {
     // A null graphics layer can occur for painting of SVG images that are not
@@ -3058,8 +3068,10 @@ void FrameView::paintTree() {
 }
 
 void FrameView::paintGraphicsLayerRecursively(GraphicsLayer* graphicsLayer) {
-  if (graphicsLayer->drawsContent())
+  if (graphicsLayer->drawsContent()) {
     graphicsLayer->paint(nullptr);
+    notifyPaint(graphicsLayer->getPaintController());
+  }
 
   if (!RuntimeEnabledFeatures::slimmingPaintV2Enabled()) {
     if (GraphicsLayer* maskLayer = graphicsLayer->maskLayer())