3 calls to file_validate()

FileValidateTest::testCallerValidation in modules/simpletest/tests/file.test: Test that the validators passed into are checked.
FileValidateTest::testInsecureExtensions in modules/simpletest/tests/file.test: Tests hard-coded security check in file_validate().
file_save_upload in includes/file.inc: Saves a file upload to a new location.

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