No document object in background.js

I'm trying to use the metamask provider from a background script in a chrome extension, but background scripts have no document object so I'm being thrown a "document is not defined" error. This is due to this line:
https://github.com/MetaMask/providers/blob/87f33cf9bb5eb78e6224e7dac3a779016b2235c2/src/MetaMaskInpageProvider.ts#L119

Start with src/MetaMaskInpageProvider.ts around line 119, the location identified as accessing document, and reproduce the provider initialization in a Chrome extension background script. Trace the initialization path and determine how it should behave without a document; done means the reported document-is-not-defined error no longer occurs in that context.

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