[LayoutNG] Float behavior simplification before larger patch.

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_fragment_builder.h"
 #include "core/layout/ng/ng_positioned_float.h"
 #include "core/layout/ng/ng_unpositioned_float.h"
 
 namespace blink {
 
 // Returns the inline size (relative to {@code parent_space}) of the
 // unpositioned float. If the float is in a different writing mode, this will
 // perform a layout.
 CORE_EXPORT LayoutUnit
 ComputeInlineSizeForUnpositionedFloat(NGConstraintSpace* parent_space,
                                       NGUnpositionedFloat* unpositioned_float);
 
 // Positions {@code unpositioned_float} into {@code new_parent_space}.
 // @returns A positioned float.
 CORE_EXPORT NGPositionedFloat
-PositionFloat(NGUnpositionedFloat*, NGConstraintSpace* new_parent_space);
+PositionFloat(LayoutUnit origin_block_offset,
+              LayoutUnit parent_bfc_block_offset,
+              NGUnpositionedFloat*,
+              NGConstraintSpace* new_parent_space);
 
 // Positions the list of {@code unpositioned_floats}. 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<NGUnpositionedFloat>>& unpositioned_floats,
     NGConstraintSpace* space);
 
 }  // namespace blink
 
 #endif  // NGFloatsUtils_h