
Fix bug in HTML5 history where you could set the same history token
twice.  There is a check to prevent this in non HTML5 history.

R=pupius
DELTA=4  (4 added, 0 deleted, 0 changed)


Revision created by MOE tool push_codebase.
MOE_MIGRATION=272836


git-svn-id: 35241bd708fe29f1f6c7a4322d322e99ff93b95e@327 0b95b8e8-c90f-11de-9d4f-f947ee5921c8

neilrahilly/closure-library,Kuniwak/google-closure-library-jsdoc,knutwalker/google-closure-library,homer6/google-closure-library,prop/closure-library,homer6/google-closure-library,homer6/google-closure-library,neilrahilly/closure-library,thinkfuse/google-closure,prop/closure-library,rethinkdb/google-closure-library,thinkfuse/google-closure,jarib/google-closure-library,mdavid/closure-library,jarib/google-closure-library,neilrahilly/closure-library,KgDesignes/closure-library,mdavid/closure-library,rethinkdb/google-closure-library,mdavid/closure-library,knutwalker/google-closure-library,thinkfuse/google-closure,KgDesignes/closure-library,Kuniwak/google-closure-library-jsdoc,KgDesignes/closure-library,prop/closure-library,rethinkdb/google-closure-library