
Fix compilation issue by declaring some types in advance of change to JS Compiler. I thought @type {?string=} would work but the presubmit doesn't like it

R=pupius
DELTA=12  (12 added, 0 deleted, 0 changed)


Revision created by MOE tool push_codebase.
MOE_MIGRATION=2720


git-svn-id: 35241bd708fe29f1f6c7a4322d322e99ff93b95e@1149 0b95b8e8-c90f-11de-9d4f-f947ee5921c8

homer6/google-closure-library,thinkfuse/google-closure,KgDesignes/closure-library,prop/closure-library,prop/closure-library,homer6/google-closure-library,thinkfuse/google-closure,KgDesignes/closure-library,knutwalker/google-closure-library,thinkfuse/google-closure,KgDesignes/closure-library,prop/closure-library,knutwalker/google-closure-library,homer6/google-closure-library