[LayoutNG] Fix orthogonal writing mode with abs/fixed descendants.

third_party/WebKit/Source/core/layout/ng/ng_out_of_flow_layout_part_test.cc

Index: third_party/WebKit/Source/core/layout/ng/ng_out_of_flow_layout_part_test.cc
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_out_of_flow_layout_part_test.cc b/third_party/WebKit/Source/core/layout/ng/ng_out_of_flow_layout_part_test.cc
index b4cfa988cc5fc65aa46f8945a4a904e9b625a870..c2b0ba66fab33c2c8788037916dc462c3896def6 100644
--- a/third_party/WebKit/Source/core/layout/ng/ng_out_of_flow_layout_part_test.cc
+++ b/third_party/WebKit/Source/core/layout/ng/ng_out_of_flow_layout_part_test.cc
@@ -78,5 +78,84 @@ TEST_F(NGOutOfFlowLayoutPartTest, FixedInsideAbs) {
   // fixed2 top is positioned: #fixed2.top
   EXPECT_EQ(fixed_2->offsetTop(), LayoutUnit(9));
 };
-}
-}
+
+TEST_F(NGOutOfFlowLayoutPartTest, OrthogonalWritingMode1) {
+  setBodyInnerHTML(
+      R"HTML(
+    <style>
+      #container {
+        position: relative;
+        writing-mode: horizontal-tb;
+        width: 200px;
+        height: 400px;
+      }
+      #abs-child {
+        position: absolute;
+        top: 10px;
+        writing-mode: vertical-rl;
+        width: auto;
+        height: 30px;
+      }
+    </style>
+    <div id="container">
+      <div id="abs-child"></div>
+    </div>
+    )HTML");
+
+  LayoutNGBlockFlow* block_flow =
+      toLayoutNGBlockFlow(getLayoutObjectByElementId("container"));
+  auto* node = new NGBlockNode(block_flow);
+  RefPtr<NGConstraintSpace> space =
+      NGConstraintSpace::CreateFromLayoutObject(*block_flow);
+
+  RefPtr<const NGPhysicalFragment> fragment =
+      node->Layout(space.get())->PhysicalFragment();
+  EXPECT_EQ(NGPhysicalSize(LayoutUnit(200), LayoutUnit(400)), fragment->Size());
+
+  fragment = toNGPhysicalBoxFragment(fragment.get())->Children()[0];
+  EXPECT_EQ(NGPhysicalSize(LayoutUnit(0), LayoutUnit(30)), fragment->Size());
+  EXPECT_EQ(NGPhysicalOffset(LayoutUnit(0), LayoutUnit(10)),
+            fragment->Offset());
+};
+
+TEST_F(NGOutOfFlowLayoutPartTest, OrthogonalWritingMode2) {
+  setBodyInnerHTML(
+      R"HTML(
+    <style>
+      #container {
+        position: relative;
+        writing-mode: horizontal-tb;
+        width: 200px;
+        height: 400px;
+      }
+      #abs-child {
+        position: absolute;
+        top: 10px;
+        writing-mode: vertical-rl;
+        width: 20%;
+        height: 30px;
+      }
+    </style>
+    <div id="container">
+      <div id="abs-child"></div>
+    </div>
+    )HTML");
+
+  LayoutNGBlockFlow* block_flow =
+      toLayoutNGBlockFlow(getLayoutObjectByElementId("container"));
+  auto* node = new NGBlockNode(block_flow);
+  RefPtr<NGConstraintSpace> space =
+      NGConstraintSpace::CreateFromLayoutObject(*block_flow);
+
+  RefPtr<const NGPhysicalFragment> fragment =
+      node->Layout(space.get())->PhysicalFragment();
+  EXPECT_EQ(NGPhysicalSize(LayoutUnit(200), LayoutUnit(400)), fragment->Size());
+
+  fragment = toNGPhysicalBoxFragment(fragment.get())->Children()[0];
+  EXPECT_EQ(NGPhysicalSize(LayoutUnit(40), LayoutUnit(30)), fragment->Size());
+  EXPECT_EQ(NGPhysicalOffset(LayoutUnit(0), LayoutUnit(10)),
+            fragment->Offset());
+};
+
+}  // namespace
+}  // namespace blink