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The language index in the dump referred by the crbug is left to -1, meaning that the language passed to TranslateInfoBarDelegate's constructor...

The call stack showed that the call came from an auto translate preference, so my only guess would be that a preference was saved for a language that is not available anymore, so I added code to protect against that.

BUG=93291
TEST=TranslateManagerTest.UnsupportedSavedLanguage

Review URL: http://codereview.chromium.org/7764003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@98661 0039d316-1c4b-4281-b951-d872f2087c98