Chrome port

[jstrieb]

I began working on a Google Chrome port of the extension in the chrome branch, but quickly hit a wall due to limitations in how much the chrome.storage.local API is allowed to store for an extension. Everything else seems to work, except for storing 16MB+ Bloom filters (which raises exceptions).

Note that in this port, I still request the unlimitedStorage permission in the manifest.json file, but Chrome doesn't seem to be respecting it. https://github.com/jstrieb/hackernews-button/blob/a479e73a417031c1c8808a17bd5ca0e23e74fc66/manifest.json#L27

For reference on why unlimitedStorage might not be working in Chrome, see the following references:

• https://developer.chrome.com/docs/extensions/reference/storage/#storage-and-throttling-limits
• https://developer.chrome.com/docs/extensions/reference/storage/#property-local
• https://bugs.chromium.org/p/chromium/issues/detail?id=58985
• https://stackoverflow.com/q/5302212/1376127

I am opening this issue as a place for discussion about how to overcome these storage limitations so that the extension can be ported to Chrome with as few changes as possible.