Rather than have multple fine grained error codes for each type
of modifier in each situation, this CL adds a new analyzer
ParserErrorCode.EXTRANEOUS_MODIFIER parallel to the fast parser
error code and updates the AstBuilder to generate that error
rather than ParserErrorCode.ABSTRACT_CLASS_MEMBER.
My goal is to review each analyzer error code similar to
ParserErrorCode.ABSTRACT_CLASS_MEMBER and map each to the same
ParserErrorCode.EXTRANEOUS_MODIFIER error code.
R=paulberry@google.com
Review-Url: https://codereview.chromium.org/2999303002 .
Dan Rubel
8786656783