Introduce NGFloatingObject

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

Index: third_party/WebKit/Source/core/layout/ng/ng_fragment_builder.h
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_fragment_builder.h b/third_party/WebKit/Source/core/layout/ng/ng_fragment_builder.h
index 0391cb1b74a359437ac3d93c94f7772c488d17cf..f9b65cdff5e974b6ae34bb5e688c1bc59d98a3f5 100644
--- a/third_party/WebKit/Source/core/layout/ng/ng_fragment_builder.h
+++ b/third_party/WebKit/Source/core/layout/ng/ng_fragment_builder.h
@@ -5,6 +5,8 @@
 #ifndef NGFragmentBuilder_h
 #define NGFragmentBuilder_h
 
+#include "core/layout/ng/ng_constraint_space.h"
+#include "core/layout/ng/ng_floating_object.h"
 #include "core/layout/ng/ng_physical_fragment.h"
 #include "core/layout/ng/ng_units.h"
 
@@ -33,6 +35,8 @@ class CORE_EXPORT NGFragmentBuilder final
   NGFragmentBuilder& SetBlockOverflow(LayoutUnit);
 
   NGFragmentBuilder& AddChild(NGFragment*, const NGLogicalOffset&);
+  NGFragmentBuilder& AddFloatingObject(NGFloatingObject*,
+                                       const NGLogicalOffset&);
 
   // Builder has non-trivial out-of-flow descendant methods.
   // These methods are building blocks for implementation of
@@ -80,6 +84,8 @@ class CORE_EXPORT NGFragmentBuilder final
   NGFragmentBuilder& AddOutOfFlowDescendant(NGBlockNode*,
                                             const NGStaticPosition&);
 
+  NGFragmentBuilder& AddUnpositionedFloat(NGFloatingObject* floating_object);
+
   void SetBreakToken(NGBreakToken* token) {
     DCHECK(!break_token_);
     break_token_ = token;
@@ -99,6 +105,11 @@ class CORE_EXPORT NGFragmentBuilder final
                                          unsigned start_index,
                                          unsigned end_index);
 
+  // List of floats that need to be positioned.
+  HeapVector<Member<NGFloatingObject>>& UnpositionedFloats() {
+    return unpositioned_floats_;
+  }
+
   DECLARE_VIRTUAL_TRACE();
 
  private:
@@ -138,6 +149,13 @@ class CORE_EXPORT NGFragmentBuilder final
   WeakBoxList out_of_flow_descendants_;
   Vector<NGStaticPosition> out_of_flow_positions_;
 
+  // Floats that need to be positioned by the next in-flow fragment that can
+  // determine its block position in space.
+  HeapVector<Member<NGFloatingObject>> unpositioned_floats_;
+
+  Vector<NGLogicalOffset> floating_object_offsets_;
+  HeapVector<Member<NGFloatingObject>> positioned_floats_;
+
   Member<NGBreakToken> break_token_;
 };