Make fetch() API use same-origin credentials by default
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Properly rethrow any exceptions from parsing JSON in Body mixin's `Json()`
This fixes#13464 by rethrowing exceptions from parsing JSON.
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feat(fetch): accept arraybuffer in consume_body
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Related to https://github.com/servo/servo/issues/20346.
I realized I am not sufficiently knowledgeable about codebases and have high confidence this PR is not ready to be accepted. Raising it as PR early to possibly ask some suggestions around codebases.
If this PR seems unrecoverable by code review, please feel freely close and unassign me from issue 🙏
This PR tries to implement #20346, updating `Body` idl and implements corresponding implementation in `body.rs` for `fetch`. Criteria for changes may includes
- does `run_array_buffer_data_algorithm` implementation is legit for allocating arraybuffer? (probably not)
- does `run_array_buffer_data_algorithm` implementation is acceptable for handling error, by naively returning `Error::JSFailed`?
- there are some number of wpt test started to PASS with this PR. Is this legit side effect, or something incorrect by current implementation?
- etcs, vice versa
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- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix#20346 (github issue number if applicable).
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- wpt test has changed in PR, need to be reviewed.
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