Templatize NGInlineItemsBuilder to take a OffsetMappingBuilder parameter

third_party/WebKit/Source/core/layout/ng/inline/ng_inline_node.h

Index: third_party/WebKit/Source/core/layout/ng/inline/ng_inline_node.h
diff --git a/third_party/WebKit/Source/core/layout/ng/inline/ng_inline_node.h b/third_party/WebKit/Source/core/layout/ng/inline/ng_inline_node.h
index f203a73af625672b4ba73c6e0c4f7ab8b38fc8be..d7c568b518b2e55e40ce37e217312648e8e6b9de 100644
--- a/third_party/WebKit/Source/core/layout/ng/inline/ng_inline_node.h
+++ b/third_party/WebKit/Source/core/layout/ng/inline/ng_inline_node.h
@@ -15,6 +15,10 @@
 
 namespace blink {
 
+template <typename OffsetMappingBuilder>
+class NGInlineItemsBuilderTemplate;
+
+class EmptyOffsetMappingBuilder;
 class LayoutBlockFlow;
 class LayoutNGBlockFlow;
 class LayoutObject;
@@ -22,7 +26,8 @@ struct MinMaxContentSize;
 class NGConstraintSpace;
 class NGInlineItem;
 class NGInlineItemRange;
-class NGInlineItemsBuilder;
+using NGInlineItemsBuilder =
+    NGInlineItemsBuilderTemplate<EmptyOffsetMappingBuilder>;
 class NGLayoutResult;
 
 // Represents an anonymous block box to be laid out, that contains consecutive