Add back 'WS_VSCROLL' flag when creating a combobox window. Without it, the dropdown list of a combobox longer than the 'default'(?) size gets truncated instead of getting a scrollbar.
Add back 'WS_VSCROLL' flag when creating a combobox window. Without it, the dropdown list of a combobox longer
than the 'default'(?) size gets truncated instead of getting a scrollbar.



BUG=13438 (http://crbug.com/13438)
TEST=In Options | Under the hood, click  'Fonts & languages' button. The default encoding menu should have a scrollbar. In languages tab, Chrome UI language list contains 49 languages instead of 20(?) or so languages.
In a shorter dropdown list (e.g. spellcheck language dropdown), there should be no scrollbar.

Review URL: http://codereview.chromium.org/120005

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@18121 0039d316-1c4b-4281-b951-d872f2087c98

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