Add a helper function to the lexer to tokenize strings that can be identifiers in ES2 and are keywords in ES3. For instance, uint, or the non-square matrix keywords. TRAC #23218 Signed-off-by: Geoff Lang Signed-off-by: Nicolas Capens Author: Jamie Madill git-svn-id: https://angleproject.googlecode.com/svn/branches/es3proto@2390 736b8ea6-26fd-11df-bfd4-992fa37f6226