The changes include:
1. Making various IDL classes builtin.
2. Making nsIContentAnalysisResponse subclass nsIContentAnalysisResult.
3. Making requestToken and userAction fields internal to CA service.
4. Added sourceWindowGlobal (the source of the data to scan) to request and
use it for content-source-is-same-tab determinations.
5. Made nsIContentAnalysisCallback expect a Result, not a Response.
6. Added cancelRequestsByUserAction and renamed cancelContentAnalysisRequest to cancelRequestsByRequestToken (deprecated).
7. Added ability for CancelAllRequests to forbid future requests (not needed but for peace of mind).
8. Added MakeResponseForTest since response is not builtin.
9. Made ContentAnalysis SupportsWeakPtr so that it can be weakly held by the MultipartRequestCallback,
which can't just re-get the service since it doesn't want the mock one.
10. Move SafeContentAnalysisResultCallback functionality to ContentAnalysisCallback.
11. Make various routines use userActionId instead of requestToken.
12. Add MultipartRequestCallback to count that we get the right number of responses.
13. Remove unneeded thread sync behavior. The only part that was kind-of
neeed was to abort behavior on a background thread if the request were
canceled first -- this is a race that we don't need to win so we now just
ignore it and ignore the result (TODO: I'm not positive I send cancel to
the agent in this case).
14. Send cancel to the agent (in all other cancel cases).
15. Simplify the request map, which is now the user action map mUserActionMap.
16. Makes the MultipartRequestCallback the nexus for filtering requests --
this way filters are applied uniformly instead of sometimes-at-some-point-
for-some-use-cases.
17. Adds showBlockedRequestDialog for showing a block dialog when requests
are rejected before they are expanded into their final form.
18. Adds SafeGetStaticErrorName for logging nsresults.
Differential Revision: https://phabricator.services.mozilla.com/D236630
469f02dde1