
Allow child components that are already rendered to be added to Container and have their ids registered.

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


Revision created by MOE tool push_codebase.
MOE_MIGRATION=3438


yamadatomonori/closure-library,yamadatomonori/closure-library,yamadatomonori/closure-library