Implement collection of out-of-flow descendants

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/ng_block_node.h"
 #include "core/layout/ng/ng_constraint_space_builder.h"
@@ skipping 62 matching lines @@
   NGLogicalOffset PositionFloatFragment(const NGFragmentBase& fragment,
                                         const NGBoxStrut& margins);
 
   // Updates block-{start|end} of the currently constructed fragment.
   //
   // This method is supposed to be called on every child but it only updates
   // the block-start once (on the first non-zero height child fragment) and
   // keeps updating block-end (on every non-zero height child).
   void UpdateMarginStrut(const NGMarginStrut& from);
 
+  NGLogicalOffset GetChildSpaceOffset() const {
+    return NGLogicalOffset(border_and_padding_.inline_start, content_size_);
+  }
+
   // Read-only Getters.
   const ComputedStyle& CurrentChildStyle() const {
     DCHECK(current_child_);
     return *current_child_->Style();
   }
 
   const NGConstraintSpace& ConstraintSpace() const {
     return *constraint_space_;
   }
 
@@ skipping 18 matching lines @@
   // MarginStrut for the previous child.
   NGMarginStrut prev_child_margin_strut_;
   // Whether the block-start was set for the currently built
   // fragment's margin strut.
   bool is_fragment_margin_strut_block_start_updated_ : 1;
 };
 
 }  // namespace blink
 
 #endif  // NGBlockLayoutAlgorithm_h