SELECT popup: Initial selection should be updated whenever a popup is shown.
SELECT popup: Initial selection should be updated whenever a popup is shown.

This is a regression by Blink r189396 [1].
We can use single PopupMenu object to open popup multiple times.
PopupListBox::m_originalIndex should be initialized unconditionally
whenever a popup is shown.

[1] http://src.chromium.org/viewvc/blink?revision=189396&view=revision

BUG=460881

Review URL: https://codereview.chromium.org/938643003

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@190815 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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