[LayoutNG] Add Bidi reordering and fill in NGPhysicalTextFragment

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

Index: third_party/WebKit/Source/core/layout/ng/ng_bidi_paragraph.h
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_bidi_paragraph.h b/third_party/WebKit/Source/core/layout/ng/ng_bidi_paragraph.h
index 9afb2fe006ffcad235133886df0577573089566f..51ba7a27ce24af54f644edc7d4d8737d5096b310 100644
--- a/third_party/WebKit/Source/core/layout/ng/ng_bidi_paragraph.h
+++ b/third_party/WebKit/Source/core/layout/ng/ng_bidi_paragraph.h
@@ -7,12 +7,14 @@
 
 #include "wtf/Allocator.h"
 #include "wtf/Forward.h"
+#include "wtf/Vector.h"
 
 #include <unicode/ubidi.h>
 
 namespace blink {
 
 class ComputedStyle;
+class NGLayoutInlineItemRange;
 
 // NGBidiParagraph resolves bidirectional runs in a paragraph using ICU BiDi.
 // http://userguide.icu-project.org/transforms/bidi
@@ -41,6 +43,11 @@ class NGBidiParagraph {
   // offset.
   unsigned GetLogicalRun(unsigned start, UBiDiLevel*) const;
 
+  // Create a list of indicies in the visual order.
+  static void IndiciesInVisualOrder(
+      const NGLayoutInlineItemRange&,
+      Vector<int32_t, 32>* item_indicies_in_visual_order_out);
+
  private:
   UBiDi* ubidi_ = nullptr;
 };