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

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

 // Copyright 2016 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.
 
 #include "core/layout/ng/ng_units.h"
 
 namespace blink {
 
 LayoutUnit MinAndMaxContentSizes::ShrinkToFit(LayoutUnit available_size) const {
   DCHECK_GE(max_content, min_content);
@@ skipping 153 matching lines @@
 NGPhysicalOffset NGPhysicalOffset::operator-(
     const NGPhysicalOffset& other) const {
   return NGPhysicalOffset{this->left - other.left, this->top - other.top};
 }
 
 NGPhysicalOffset& NGPhysicalOffset::operator-=(const NGPhysicalOffset& other) {
   *this = *this - other;
   return *this;
 }
 
+bool NGPhysicalOffset::operator==(const NGPhysicalOffset& other) const {
+  return other.left == left && other.top == top;
+}
+
 bool NGBoxStrut::IsEmpty() const {
   return *this == NGBoxStrut();
 }
 
 bool NGBoxStrut::operator==(const NGBoxStrut& other) const {
   return std::tie(other.inline_start, other.inline_end, other.block_start,
                   other.block_end) ==
          std::tie(inline_start, inline_end, block_start, block_end);
 }
 
@@ skipping 97 matching lines @@
       break;
     case kSidewaysLeftRight:
       position.type =
           (direction == TextDirection::kLtr) ? kBottomLeft : kTopLeft;
       break;
   }
   return position;
 }
 
 }  // namespace blink