RELNOTES[INC]: Make BrowserChannel only accept object literals, not legacy goog.structs.Map.
RELNOTES[INC]: Make BrowserChannel only accept object literals, not legacy goog.structs.Map.

This lets me remove a call to the deprecated goog.structs.forEach(). #jscleanup

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=154541526

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