Add container_block_offset,top_offset to NGFloatingObject.

third_party/WebKit/Source/core/layout/ng/ng_block_layout_algorithm.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 NGBlockLayoutAlgorithm_h
 #define NGBlockLayoutAlgorithm_h
 
 #include "core/CoreExport.h"
 #include "core/layout/ng/geometry/ng_margin_strut.h"
 #include "core/layout/ng/ng_block_break_token.h"
@@ skipping 77 matching lines @@
   // Positions the fragment that knows its BFC offset.
   NGLogicalOffset PositionWithBfcOffset(const NGBoxFragment&);
 
   // Positions using the parent BFC offset.
   // Fragment doesn't know its offset but we can still calculate its BFC
   // position because the parent fragment's BFC is known.
   // Example:
   //   BFC Offset is known here because of the padding.
   //   <div style="padding: 1px">
   //     <div id="empty-div" style="margins: 1px"></div>
-  NGLogicalOffset PositionWithParentBfc(const NGBoxFragment&);
+  NGLogicalOffset PositionWithParentBfc(const NGConstraintSpace&,
+                                        const NGBoxFragment&);
 
   NGLogicalOffset PositionLegacy(const NGConstraintSpace& child_space);
 
   void FinishFloatChildLayout(const ComputedStyle&,
                               const NGConstraintSpace&,
                               const NGLayoutResult*);
 
   // Final adjustments before fragment creation. We need to prevent the
   // fragment from crossing fragmentainer boundaries, and rather create a break
   // token if we're out of space.
@@ skipping 13 matching lines @@
   LayoutUnit max_inline_size_;
   // MarginStrut for the previous child.
   NGMarginStrut curr_margin_strut_;
   NGLogicalOffset curr_bfc_offset_;
   NGBoxStrut curr_child_margins_;
 };
 
 }  // namespace blink
 
 #endif  // NGBlockLayoutAlgorithm_h