Pass testSource as the opt_scope of found tests instead of goog.global
Pass testSource as the opt_scope of found tests instead of goog.global

RELNOTES[INC]:Pass testSource instead of goog.global.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=170058699

google/closure-library,platinumpixs/google-closure-library,teppeis/closure-library,platinumpixs/google-closure-library,google/closure-library,lucidsoftware/closure-library,teppeis/closure-library,teppeis/closure-library,google/closure-library,lucidsoftware/closure-library,lucidsoftware/closure-library,lucidsoftware/closure-library,google/closure-library,platinumpixs/google-closure-library,teppeis/closure-library,google/closure-library,platinumpixs/google-closure-library