[test all] Back out "Revert D20171428: [profiler] fix chrome tracing for profiler run with cuda"
Summary:
There was an error in
https://github.com/pytorch/pytorch/pull/30724/files that resulted in
export_chrome_trace generating invalid JSON. This only came up when the
profiler is run with use_cuda=True from what it looks like. In the future, we
should have tests that ensure we generate valid JSON because we no longer use
the json library.
ghstack-source-id: 99508836
Test Plan: Added a unit test.
Differential Revision: D20237040
fbshipit-source-id: 510befbdf4ec39632ac56544afcddee6c8cc3aca
