Reorder state checks to be consistent between requestStorageAccess and hasStorageAccess

[bvandersloot-mozilla]

• [x] At least two implementers are interested (and none opposed):
  • Mozilla
  • Chrome
• [ ] Tests are written and can be reviewed and commented upon at:
  • …
• [ ] Implementation bugs are filed:
  • Chromium: …
  • Gecko: …
  • WebKit: …

This should resolve #134. TODO before merge:

• [x] Second implementer interest
• [ ] Add a WPT
• [ ] File implementation bugs

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[johannhof]

@bvandersloot-mozilla can you file bugs with implementors? I'll try to merge this in the meantime...