
help out the compiler's type inference a bit.

R=nlesiecki
DELTA=9  (5 added, 0 deleted, 4 changed)


Revision created by MOE tool push_codebase.
MOE_MIGRATION=463


git-svn-id: 35241bd708fe29f1f6c7a4322d322e99ff93b95e@697 0b95b8e8-c90f-11de-9d4f-f947ee5921c8

mdavid/closure-library,mdavid/closure-library,mdavid/closure-library