Fix issue 23221: accesskey is not supported on Chromium Mac.

The key point is to provide correct unmodifiedText field for fabricated Char events, because in webkit, unmodifiedText is used for matching accesskey.

BUG=23221
TEST=See bug report.

Review URL: http://codereview.chromium.org/460105

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@34035 0039d316-1c4b-4281-b951-d872f2087c98
2 files changed