[TableNG] Change IsSpecified to IsPercent or IsFixed

Bug: 958381
Change-Id: I702af63724bac4962258186b089940f3f397c9d2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2295834
Commit-Queue: Ian Kilpatrick <ikilpatrick@chromium.org>
Reviewed-by: Aleks Totic <atotic@chromium.org>
Cr-Commit-Position: refs/heads/master@{#791670}

third_party/blink/renderer/core/layout/ng/table/ng_table_layout_algorithm_types.cc

@@ -167,7 +167,9 @@ NGTableTypes::Section NGTableTypes::CreateSection(
     wtf_size_t rows,
     LayoutUnit block_size) {
   const Length& section_css_block_size = section.Style().LogicalHeight();
-  bool is_constrained = section_css_block_size.IsSpecified();
+  // TODO(crbug.com/1105272): Decide what to do with |Length::IsCalculated()|.
+  bool is_constrained =
+      section_css_block_size.IsPercent() || section_css_block_size.IsFixed();
   base::Optional<float> percent;
   if (section_css_block_size.IsPercent())
     percent = section_css_block_size.Percent();