Add NGLogicalOrigin and NGLogicalLeader parameters to NGLayoutOpportunityIterator.

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

Index: third_party/WebKit/Source/core/layout/ng/ng_layout_opportunity_iterator.h
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_layout_opportunity_iterator.h b/third_party/WebKit/Source/core/layout/ng/ng_layout_opportunity_iterator.h
index e71fffaf89368d3e4a16bb6eeca86c3fd9ce2be3..da9c9432df65902381fd5bc6e512fe43b59c851e 100644
--- a/third_party/WebKit/Source/core/layout/ng/ng_layout_opportunity_iterator.h
+++ b/third_party/WebKit/Source/core/layout/ng/ng_layout_opportunity_iterator.h
@@ -21,9 +21,20 @@ typedef Vector<NGLayoutOpportunity> NGLayoutOpportunities;
 class CORE_EXPORT NGLayoutOpportunityIterator final
     : public GarbageCollectedFinalized<NGLayoutOpportunityIterator> {
  public:
-  NGLayoutOpportunityIterator(NGConstraintSpace* space,
-                              unsigned clear,
-                              bool for_inline_or_bfc);
+  // Default constructor.
+  //
+  // @param space Constraint space with exclusions for which this iterator needs
+  //              to generate layout opportunities.
+  // @param origin_point Optional origin_point parameter that is used as a
+  //                     default start point for layout opportunities.
+  // @param leader_point Optional 'leader' parameter that is used to specify the
+  //                     ending point of temporary excluded rectangle which
+  //                     starts from 'origin'. This rectangle may represent a
+  //                     text fragment for example.
+  NGLayoutOpportunityIterator(
+      NGConstraintSpace* space,
+      const NGLogicalOrigin origin_point = NGLogicalOrigin(),
+      const NGLogicalLeader leader_point = NGLogicalLeader());
 
   // Gets the next Layout Opportunity or nullptr if the search is exhausted.
   // TODO(chrome-layout-team): Refactor with using C++ <iterator> library.
@@ -46,6 +57,8 @@ class CORE_EXPORT NGLayoutOpportunityIterator final
   }
 
   Member<NGConstraintSpace> constraint_space_;
+  const NGLogicalOrigin origin_point_;
+  const NGLogicalLeader leader_point_;
 
   NGLayoutOpportunities opportunities_;
   NGLayoutOpportunities::const_iterator opportunity_iter_;