Statistics of LayoutBox rare data reasons

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

Index: third_party/WebKit/Source/core/paint/PaintLayer.cpp
diff --git a/third_party/WebKit/Source/core/paint/PaintLayer.cpp b/third_party/WebKit/Source/core/paint/PaintLayer.cpp
index aabe1c5f5f715dabeeb6687319411f2a189aab07..a4e6cd8ef055c9899c304c135659b2a405990ca4 100644
--- a/third_party/WebKit/Source/core/paint/PaintLayer.cpp
+++ b/third_party/WebKit/Source/core/paint/PaintLayer.cpp
@@ -774,6 +774,23 @@ void PaintLayer::update3DTransformedDescendantStatus() {
 void PaintLayer::updateLayerPosition() {
   LayoutPoint localPoint;
 
+  if (!layoutObject().isOutOfFlowPositioned() && parent() &&
+      parent()->layoutObject().isLayoutInline() &&
+      ((parent()->parent() &&
+        !parent()->parent()->layoutObject().isLayoutBlock()) ||
+       parent()->location() != LayoutPoint())) {
+    auto reason = layoutObject().isFloating() ? ReasonLOFloatLayerBug1
+                                              : ReasonLOFloatLayerBug2;
+    for (LayoutObject* object = layoutObject().parent();
+         object && object != parent()->layoutObject();
+         object = object->parent()) {
+      if (object->isFloating()) {
+        object->m_rareStat.addReason(reason);
+        LOG(ERROR) << "Found: !!! " << reason;
+      }
+    }
+  }
+
   bool didResize = false;
   if (layoutObject().isInline() && layoutObject().isLayoutInline()) {
     LayoutInline& inlineFlow = toLayoutInline(layoutObject());