Auto: change errant base::VKEY_* values to just VKEY_*.
Auto: change errant base::VKEY_* values to just VKEY_*.

This shouldn't affect mac or windows as the definitions with our without base:: are identical there.

BUG=19664

Review URL: http://codereview.chromium.org/174121

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@24000 0039d316-1c4b-4281-b951-d872f2087c98

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