[jfx17u] RFR: 8311097: Synchron XMLHttpRequest not receiving data

[Jose Pereda]

Clean backport of 8311097: Synchron XMLHttpRequest not receiving data
Reviewed-by: jbhaskar, kcr

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Commit messages:
 - 8311097: Synchron XMLHttpRequest not receiving data

Changes: https://git.openjdk.org/jfx17u/pull/146/files
 Webrev: https://webrevs.openjdk.org/?repo=jfx17u&pr=146&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8311097
  Stats: 52 lines in 4 files changed: 50 ins; 1 del; 1 mod
  Patch: https://git.openjdk.org/jfx17u/pull/146.diff
  Fetch: git fetch https://git.openjdk.org/jfx17u.git pull/146/head:pull/146

PR: https://git.openjdk.org/jfx17u/pull/146