Use SecurityError for document state check

[marcoscaceres]

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We currently have an over-reliance on NotAllowedError (particularly in Cred Man). This makes things a bit more distinguishable (for interop testing), and lets developers know a bit more about what's going on.

The following tasks have been completed:

• [ ] Modified Web platform tests (link)

Implementation commitment:

• [ ] WebKit (link to issue)
• [ ] Chromium (link to issue)
• [ ] Gecko (link to issue)

Documentation and checks

• [ ] Affects privacy
• [ ] Affects security
• [ ] Pinged MDN
• [ ] Updated Explainer

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[marcoscaceres]

Blocked on tests and updating implementations.

[marcoscaceres]

@samuelgoto, you ok with this change? If yes, I'll make them also in WebKit.

[samuelgoto]

@samuelgoto, you ok with this change?

Sounds reasonable to me to be more specific than NotAllowedError.