WebGL spec specifies maximum length of all types of tokens - not just identifier tokens. And it also means preprocessing-tokens, not compiler tokens.
Note that this implies that non-compliant tokens even inside excluded #if blocks will trigger error.

TODO: This behavior should be implemented as a preprocessor option, so that a GLES2 compiler can choose to disable it.
Review URL: https://codereview.appspot.com/6355066

git-svn-id: https://angleproject.googlecode.com/svn/trunk@1193 736b8ea6-26fd-11df-bfd4-992fa37f6226