Statistics of LayoutBox rare data reasons

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

Index: third_party/WebKit/Source/core/paint/ObjectPaintInvalidator.cpp
diff --git a/third_party/WebKit/Source/core/paint/ObjectPaintInvalidator.cpp b/third_party/WebKit/Source/core/paint/ObjectPaintInvalidator.cpp
index 256b397caaf59cb537cd978413d18291e05fb323..c31900d30c0e5357eb5135dab45c42c0980d6112 100644
--- a/third_party/WebKit/Source/core/paint/ObjectPaintInvalidator.cpp
+++ b/third_party/WebKit/Source/core/paint/ObjectPaintInvalidator.cpp
@@ -442,6 +442,18 @@ void ObjectPaintInvalidator::setLocationInBacking(const LayoutPoint& location) {
   } else {
     locationInBackingMap().set(&m_object, location);
     m_object.getMutableForPainting().setHasPreviousLocationInBacking(true);
+    m_object.m_rareStat.addReason(ReasonLOPreviousLocation);
+
+    if (m_object.visualRect().isEmpty())
+      m_object.m_rareStat.addReason(ReasonLocationOffsetObject);
+    if (m_object.isBox())
+      m_object.m_rareStat.addReason(ReasonLocationOffsetBox);
+    if (m_object.isText())
+      m_object.m_rareStat.addReason(ReasonLocationOffsetText);
+    if (m_object.isLayoutInline())
+      m_object.m_rareStat.addReason(ReasonLocationOffsetInline);
+    if (m_object.isSVG())
+      m_object.m_rareStat.addReason(ReasonLocationOffsetSVG);
   }
 }