TEXTAREA: Fix selectionStart and selectionEnd after setting value while parsing TEXTAREA children.

We checked IsFinishedParsingChildren() in SetValueCommon() in order to
avoid changing selection repeatedly while parsing. It caused this bug,
and the check is unnecessary now because parsing TEXTAREA children
doesn't move selectionStart/End to the end of the value since

Bug: 822639
Change-Id: Ic4353c8cac372da1fc964f51576b306b240ae6b7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1583172
Reviewed-by: Yoshifumi Inoue <yosin@chromium.org>
Commit-Queue: Kent Tamura <tkent@chromium.org>
Cr-Commit-Position: refs/heads/master@{#654325}
2 files changed