<!-- Please describe your changes on the following line: -->
Replace uses of spidermonkey-specific JS_GetArrayBufferViewType with ArrayBufferView impl's method get_array_type().
Tests pass:
./mach test-wpt tests/wpt/web-platform-tests/WebCrypto
./mach test-wpt tests/wpt/web-platform-tests/webgl
---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: -->
- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix#15605 (github issue number if applicable).
- [x] There are tests for these changes
<!-- Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process. -->
Source-Repo: https://github.com/servo/servo
Source-Revision: 907c1ef3d280269b5fe87a67759411ab2f938a72
--HG--
extra : subtree_source : https%3A//hg.mozilla.org/projects/converted-servo-linear
extra : subtree_revision : 186ac6f4f13d2dacd6825a11318af70ea59dad98