Add container_block_offset,top_offset to NGFloatingObject.

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

 // Copyright 2017 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 NGFloatsUtils_h
 #define NGFloatsUtils_h
 
 #include "core/layout/ng/geometry/ng_logical_offset.h"
 #include "core/layout/ng/ng_constraint_space.h"
 #include "core/layout/ng/ng_floating_object.h"
 #include "core/layout/ng/ng_fragment_builder.h"
 #include "core/layout/ng/ng_positioned_float.h"
 
 namespace blink {
 
 // Positions {@code floating_object} into {@code new_parent_space}.
 // @returns A positioned float.
 CORE_EXPORT NGPositionedFloat
 PositionFloat(NGFloatingObject*, NGConstraintSpace* new_parent_space);
 
 // Positions the list of {@code floating_objects}. Adds them as exclusions to
 // {@code space}.
 CORE_EXPORT const Vector<NGPositionedFloat> PositionFloats(
     LayoutUnit origin_block_offset,
     LayoutUnit from_block_offset,
+    LayoutUnit container_block_offset,
     const Vector<RefPtr<NGFloatingObject>>& floating_objects,
     NGConstraintSpace* space);
 
 }  // namespace blink
 
 #endif  // NGFloatsUtils_h