[LayoutNG] Move NGLineInfo to the member field of NGLineBreaker

This patch adds NGLineInfo and NGInlineItemResults to the
member field of NGLineBreaker.

These are the output of the NGLineInfo, analogous to
NGContainerFragmentBuilder to NGLayoutAlgorithm. Adding to
the member fields makes NGLineBreaker closeer to

Note, NGInlineItemResults should be local and should
std::move when the line is complete if we follow the existing
pattern. It has inline buffer however, which makes std::move
expensive. This patch keeps it as a pointer to the buffer in

Bug: 636993
Cq-Include-Trybots: luci.chromium.try:linux_layout_tests_layout_ng
Change-Id: Ibc66fae8a8653196535dfa469b94a3255c0cd8e8
Reviewed-on: https://chromium-review.googlesource.com/1138136
Commit-Queue: Koji Ishii <kojii@chromium.org>
Reviewed-by: Ian Kilpatrick <ikilpatrick@chromium.org>
Reviewed-by: Emil A Eklund <eae@chromium.org>
Cr-Commit-Position: refs/heads/master@{#575844}
4 files changed