Tiny clean-up: replace an if (goog.DEBUG) with goog.asserts.assert in uri/utils.js now that the compiler understands that String.prototype.indexOf has no side effects.
Tiny clean-up: replace an if (goog.DEBUG) with goog.asserts.assert in uri/utils.js now that the compiler understands that String.prototype.indexOf has no side effects.

RELNOTES: none

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=145147815

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