Use Layout Opportunity Iterator to position new FC blocks.

third_party/WebKit/Source/core/layout/ng/inline/ng_inline_layout_algorithm.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/inline/ng_inline_layout_algorithm.h"
 
 #include "core/layout/ng/inline/ng_bidi_paragraph.h"
 #include "core/layout/ng/inline/ng_inline_break_token.h"
 #include "core/layout/ng/inline/ng_inline_node.h"
 #include "core/layout/ng/inline/ng_line_box_fragment.h"
@@ skipping 267 matching lines @@
   }
   DCHECK_GE(end_position_, last_break_opportunity_position_);
   end_position_ -= last_break_opportunity_position_;
   last_break_opportunity_position_ = LayoutUnit();
 #if DCHECK_IS_ON()
   is_bidi_reordered_ = false;
 #endif
 
   NGLogicalOffset origin_point =
       GetOriginPointForFloats(ConstraintSpace(), content_size_);
-  PositionPendingFloats(origin_point.block_offset, MutableConstraintSpace(),
-                        &container_builder_);
+  PositionPendingFloats(origin_point.block_offset, &container_builder_,
+                        MutableConstraintSpace());
   FindNextLayoutOpportunity();
   return true;
 }
 
 void NGInlineLayoutAlgorithm::BidiReorder(
     Vector<LineItemChunk, 32>* line_item_chunks) {
 #if DCHECK_IS_ON()
   DCHECK(!is_bidi_reordered_);
   is_bidi_reordered_ = true;
 #endif
@@ skipping 76 matching lines @@
       layout_result->PhysicalFragment().Get());
 
   bool float_does_not_fit = end_position + float_fragment.InlineSize() >
                             current_opportunity_.InlineSize();
   // Check if we already have a pending float. That's because a float cannot be
   // higher than any block or floated box generated before.
   if (!container_builder_.UnpositionedFloats().IsEmpty() ||
       float_does_not_fit) {
     container_builder_.AddUnpositionedFloat(floating_object);
   } else {
-    NGLogicalOffset offset =
+    floating_object->logical_offset =
         PositionFloat(floating_object.Get(), MutableConstraintSpace());
-    container_builder_.AddFloatingObject(floating_object, offset);
+    container_builder_.MutablePositionedFloats().push_back(floating_object);
     FindNextLayoutOpportunity();
   }
 }
 
 bool NGInlineLayoutAlgorithm::PlaceItems(
     const Vector<LineItemChunk, 32>& line_item_chunks) {
   const Vector<NGLayoutInlineItem>& items = Node()->Items();
 
   // Use a "strut" (a zero-width inline box with the element's font and
   // line height properties) as the initial metrics for the line box.
@@ skipping 186 matching lines @@
 
   // max-content is the width without any line wrapping.
   // TODO(kojii): Implement hard breaks (<br> etc.) to break.
   for (const auto& item : Node()->Items())
     sizes.max_content += InlineSize(item);
 
   return sizes;
 }
 
 }  // namespace blink