Modifies SourceFile.fromZipFile() to use fromZipInput() to reduce duplication.
Modifies SourceFile.fromZipFile() to use fromZipInput() to reduce duplication.

This should cause no behavioral changes, except possibly changing the exceptions thrown in some error cases (e.g., a ZipException instead of some other IOException).

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=247054592

monetate/closure-compiler,google/closure-compiler,google/closure-compiler,vobruba-martin/closure-compiler,Yannic/closure-compiler,nawawi/closure-compiler,ChadKillingsworth/closure-compiler,nawawi/closure-compiler,Yannic/closure-compiler,monetate/closure-compiler,nawawi/closure-compiler,vobruba-martin/closure-compiler,Yannic/closure-compiler,ChadKillingsworth/closure-compiler,google/closure-compiler,ChadKillingsworth/closure-compiler,ChadKillingsworth/closure-compiler,monetate/closure-compiler,vobruba-martin/closure-compiler,vobruba-martin/closure-compiler,Yannic/closure-compiler,nawawi/closure-compiler,monetate/closure-compiler,google/closure-compiler