Cleanup traversing in LayoutSelection.cpp::CollectSelectedMap()
Since |selection_start| is always before |selection_end|(L322),
we don't need to switch back traversing.
Patch[1] introduced the backward traversal to support CSS Region.
Since, Blink doesn't support CSS Region, we can remove it safely.
[1] https://chromiumcodereview.appspot.com/23674007 [CSSRegions] Not possible to
clear the selection when mixing content from different FlowThreads
BUG=708453
Review-Url: https://codereview.chromium.org/2895193002
Cr-Commit-Position: refs/heads/master@{#473872}
1 file changed
