[LayoutNG] Compute baseline from fragment tree

third_party/WebKit/Source/core/layout/LayoutBlockFlow.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 2588 matching lines @@
     }
     return (FirstLineBox()->LogicalTop() +
             font_data->GetFontMetrics().Ascent(FirstRootBox()->BaselineType()))
         .ToInt();
   }
   return -1;
 }
 
 int LayoutBlockFlow::InlineBlockBaseline(
     LineDirectionMode line_direction) const {
-  // CSS2.1 states that the baseline of an 'inline-block' is:
-  // the baseline of the last line box in the normal flow, unless it has
-  // either no in-flow line boxes or if its 'overflow' property has a computed
-  // value other than 'visible', in which case the baseline is the bottom
-  // margin edge.
-  // We likewise avoid using the last line box in the case of size containment,
-  // where the block's contents shouldn't be considered when laying out its
-  // ancestors or siblings.
-
-  if ((!Style()->IsOverflowVisible() &&
-       !ShouldIgnoreOverflowPropertyForInlineBlockBaseline()) ||
-      Style()->ContainsSize()) {
+  if (UseLogicalBottomMarginEdgeForInlineBlockBaseline()) {
     // We are not calling baselinePosition here because the caller should add
     // the margin-top/margin-right, not us.
     return (line_direction == kHorizontalLine ? Size().Height() + MarginBottom()
                                               : Size().Width() + MarginLeft())
         .ToInt();
   }
   if (IsWritingModeRoot() && !IsRubyRun())
     return -1;
   if (!ChildrenInline())
     return LayoutBlock::InlineBlockBaseline(line_direction);
@@ skipping 2112 matching lines @@
         include_block_overflows);
 }
 
 void LayoutBlockFlow::InvalidateDisplayItemClients(
     PaintInvalidationReason invalidation_reason) const {
   BlockFlowPaintInvalidator(*this).InvalidateDisplayItemClients(
       invalidation_reason);
 }
 
 }  // namespace blink