[LayoutNG] Add NGLineBoxFragment

third_party/WebKit/Source/core/layout/ng/ng_fragment.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_fragment.h"
 
 namespace blink {
 
 LayoutUnit NGFragment::InlineSize() const {
   return writing_mode_ == kHorizontalTopBottom ? physical_fragment_->Width()
                                                : physical_fragment_->Height();
 }
 
 LayoutUnit NGFragment::BlockSize() const {
   return writing_mode_ == kHorizontalTopBottom ? physical_fragment_->Height()
                                                : physical_fragment_->Width();
 }
 
-LayoutUnit NGFragment::InlineOverflow() const {
-  return writing_mode_ == kHorizontalTopBottom
-             ? physical_fragment_->WidthOverflow()
-             : physical_fragment_->HeightOverflow();
-}
-
-LayoutUnit NGFragment::BlockOverflow() const {
-  return writing_mode_ == kHorizontalTopBottom
-             ? physical_fragment_->HeightOverflow()
-             : physical_fragment_->WidthOverflow();
-}
-
 LayoutUnit NGFragment::InlineOffset() const {
   return writing_mode_ == kHorizontalTopBottom
              ? physical_fragment_->LeftOffset()
              : physical_fragment_->TopOffset();
 }
 
 LayoutUnit NGFragment::BlockOffset() const {
   return writing_mode_ == kHorizontalTopBottom
              ? physical_fragment_->TopOffset()
              : physical_fragment_->LeftOffset();
 }
 
 NGPhysicalFragment::NGFragmentType NGFragment::Type() const {
   return physical_fragment_->Type();
 }
 
 }  // namespace blink