[LayoutNG] Compute baseline from fragment tree

third_party/WebKit/Source/core/layout/ng/inline/ng_line_breaker.cc

Index: third_party/WebKit/Source/core/layout/ng/inline/ng_line_breaker.cc
diff --git a/third_party/WebKit/Source/core/layout/ng/inline/ng_line_breaker.cc b/third_party/WebKit/Source/core/layout/ng/inline/ng_line_breaker.cc
index f2543da65ef54e28b6f9ee6494ab46dd7a800974..21d768c611a5703d276e51bb71dc1a69de714713 100644
--- a/third_party/WebKit/Source/core/layout/ng/inline/ng_line_breaker.cc
+++ b/third_party/WebKit/Source/core/layout/ng/inline/ng_line_breaker.cc
@@ -164,7 +164,7 @@ void NGLineBreaker::BreakLine(NGLineInfo* line_info) {
     if (item.Type() == NGInlineItem::kText) {
       state = HandleText(*item_results, item, item_result);
     } else if (item.Type() == NGInlineItem::kAtomicInline) {
-      state = HandleAtomicInline(item, item_result);
+      state = HandleAtomicInline(item, item_result, *line_info);
     } else if (item.Type() == NGInlineItem::kControl) {
       state = HandleControlItem(item, item_result);
       if (state == LineBreakState::kForcedBreak) {
@@ -352,15 +352,28 @@ NGLineBreaker::LineBreakState NGLineBreaker::HandleControlItem(
 
 NGLineBreaker::LineBreakState NGLineBreaker::HandleAtomicInline(
     const NGInlineItem& item,
-    NGInlineItemResult* item_result) {
+    NGInlineItemResult* item_result,
+    const NGLineInfo& line_info) {
   DCHECK_EQ(item.Type(), NGInlineItem::kAtomicInline);
 
   if (!should_create_line_box_)
     SetShouldCreateLineBox();
 
-  NGBlockNode node = NGBlockNode(ToLayoutBox(item.GetLayoutObject()));
+  LayoutBox* layout_box = ToLayoutBox(item.GetLayoutObject());
+  NGBlockNode node = NGBlockNode(layout_box);
   const ComputedStyle& style = node.Style();
   NGConstraintSpaceBuilder constraint_space_builder(constraint_space_);
+  // Request to compute baseline during the layout, except when we know the box
+  // would synthesize box-baseline.
+  if (NGBaseline::ShouldPropagateBaselines(layout_box)) {
+    constraint_space_builder.AddBaselineRequest(
+        line_info.UseFirstLineStyle()
+            ? NGBaselineAlgorithmType::kAtomicInlineForFirstLine
+            : NGBaselineAlgorithmType::kAtomicInline,
+        IsHorizontalWritingMode(constraint_space_->WritingMode())
+            ? FontBaseline::kAlphabeticBaseline
+            : FontBaseline::kIdeographicBaseline);
+  }
   RefPtr<NGConstraintSpace> constraint_space =
       constraint_space_builder.SetIsNewFormattingContext(true)
           .SetIsShrinkToFit(true)