Fix orthogonal mode legacy mismatch

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

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/layout/ng/ng_writing_mode.h"
 
+#include "core/layout/LayoutObject.h"
 #include "wtf/Assertions.h"
 
 namespace blink {
 
 NGWritingMode FromPlatformWritingMode(WritingMode mode) {
   switch (mode) {
     case WritingMode::kHorizontalTb:
       return kHorizontalTopBottom;
     case WritingMode::kVerticalRl:
       return kVerticalRightLeft;
     case WritingMode::kVerticalLr:
       return kVerticalLeftRight;
     default:
       NOTREACHED();
       return kHorizontalTopBottom;
   }
 }
 
+bool IsParallelWritingMode(NGWritingMode a, NGWritingMode b) {
+  return (a == kHorizontalTopBottom) == (b == kHorizontalTopBottom);
+}
+
 }  // namespace blink