Bug 851454 - Define the format of "downloads.json" and of the parameters of createDownload. r=enn
Bug 836437 - Part 1 of 3 - Unify DownloadLegacy tests in preparation for resuming support. r=enn

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rename : toolkit/components/jsdownloads/test/unit/test_DownloadCore.js => toolkit/components/jsdownloads/test/unit/common_test_Download.js