[LayoutNG] Fix incorrectly positioned empty blocks inside of new BFC

third_party/WebKit/Source/core/layout/ng/ng_units.cc

Index: third_party/WebKit/Source/core/layout/ng/ng_units.cc
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_units.cc b/third_party/WebKit/Source/core/layout/ng/ng_units.cc
index 68c50314d995c920476c492b0fa3bb3d65ac5b74..c3c21c28d08ce36ce450430a1c4141a2e6da43de 100644
--- a/third_party/WebKit/Source/core/layout/ng/ng_units.cc
+++ b/third_party/WebKit/Source/core/layout/ng/ng_units.cc
@@ -171,6 +171,10 @@ NGPhysicalOffset& NGPhysicalOffset::operator-=(const NGPhysicalOffset& other) {
   return *this;
 }
 
+bool NGPhysicalOffset::operator==(const NGPhysicalOffset& other) const {
+  return other.left == left && other.top == top;
+}
+
 bool NGBoxStrut::IsEmpty() const {
   return *this == NGBoxStrut();
 }