[LayoutNG] Fix empty inlines to influence the used line height

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

Index: third_party/WebKit/Source/core/layout/ng/inline/ng_inline_box_state.h
diff --git a/third_party/WebKit/Source/core/layout/ng/inline/ng_inline_box_state.h b/third_party/WebKit/Source/core/layout/ng/inline/ng_inline_box_state.h
index e3675e189f5cd7b461ba08e72230a922c6cd72d9..9a52e3958134282a9056c8380491c9b242aa94b8 100644
--- a/third_party/WebKit/Source/core/layout/ng/inline/ng_inline_box_state.h
+++ b/third_party/WebKit/Source/core/layout/ng/inline/ng_inline_box_state.h
@@ -40,7 +40,11 @@ struct NGInlineBoxState {
   bool include_used_fonts = false;
 
   // Compute text metrics for a box. All text in a box share the same metrics.
-  void ComputeTextMetrics(const NGInlineItem&, FontBaseline);
+  void ComputeTextMetrics(const ComputedStyle& style, FontBaseline);
+  void AccumulateUsedFonts(const NGInlineItem&,
+                           unsigned start,
+                           unsigned end,
+                           FontBaseline);
 };
 
 // Represents the inline tree structure. This class provides:
@@ -49,9 +53,12 @@ struct NGInlineBoxState {
 // 3) Cache common values for a box.
 class NGInlineLayoutStateStack {
  public:
+  // The box state for the line box.
+  NGInlineBoxState& LineBoxState() { return stack_.front(); }
+
   // Initialize the box state stack for a new line.
   // @return The initial box state for the line.
-  NGInlineBoxState* OnBeginPlaceItems(const ComputedStyle*);
+  NGInlineBoxState* OnBeginPlaceItems(const ComputedStyle*, FontBaseline);
 
   // Push a box state stack.
   NGInlineBoxState* OnOpenTag(const NGInlineItem&,