
Changing the return type of LinkedMap#getKeys to non-nullable to avoid the
unnecessary casting on the caller side. This change is safe as the underlying
method LinkedMap#map is already returning {!Array.<string>}.

R=nnaze,arv
DELTA=1  (0 added, 0 deleted, 1 changed)


Revision created by MOE tool push_codebase.
MOE_MIGRATION=5868


git-svn-id: 35241bd708fe29f1f6c7a4322d322e99ff93b95e@2324 0b95b8e8-c90f-11de-9d4f-f947ee5921c8

jarib/google-closure-library,Kuniwak/google-closure-library-jsdoc,Kuniwak/google-closure-library-jsdoc,jarib/google-closure-library