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

third_party/WebKit/Source/core/layout/ng/ng_physical_fragment.h

 // 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.
 
 #ifndef NGPhysicalFragment_h
 #define NGPhysicalFragment_h
 
 #include "core/CoreExport.h"
 #include "core/layout/ng/ng_units.h"
 #include "platform/LayoutUnit.h"
@@ skipping 48 matching lines @@
   LayoutUnit LeftOffset() const {
     DCHECK(is_placed_);
     return offset_.left;
   }
 
   LayoutUnit TopOffset() const {
     DCHECK(is_placed_);
     return offset_.top;
   }
 
+  NGPhysicalOffset Offset() const {
+    DCHECK(is_placed_);
+    return offset_;
+  }
+
   // Should only be used by the parent fragement's layout.
   void SetOffset(NGPhysicalOffset offset) {
     DCHECK(!is_placed_);
     offset_ = offset;
     is_placed_ = true;
   }
 
   NGBreakToken* BreakToken() const { return break_token_; }
 
   LayoutObject* GetLayoutObject() const { return layout_object_; }
@@ skipping 53 matching lines @@
   unsigned type_ : 1;
   unsigned is_placed_ : 1;
 
  private:
   void destroy() const;
 };
 
 }  // namespace blink
 
 #endif  // NGPhysicalFragment_h