[LayoutNG] Set InlineBoxWrapper when copying fragments to LayoutBox
This patch fixes to set InlineBoxWrapper when copying fragments to
LayoutBox.
To create InlineBox'es, NGInlineNode::CopyFragmentDataToLayoutBox()
calls LayoutBlockFlow::ConstructLine(), but it does not set
InlineBoxWrapper.
LayoutBlockFlow::ComputeBlockDirectionPositionsForLine() sets
InlineBoxWrapper but LayoutNG does not call this function. It does
several other things, but SetInlineBoxWrapper() is the only thing needed
for CopyFragmentDataToLayoutBox().
BUG=636993, 739365
Review-Url: https://codereview.chromium.org/2975663002
Cr-Commit-Position: refs/heads/master@{#485142}
2 files changed
