Revert "Make SyncIDs a packed type." This reverts commit 9de913077a5fcc3d2f2e327b56bbe30efe2fde96. Reason for revert: Fails win-trace, somewhat flakily. Original change's description: > Make SyncIDs a packed type. > > This prepares syncs to use a simple resource map like other > types, which will make life easier in the trace interpreter. > > Bug: angleproject:7775 > Change-Id: Ic2867f6133256f5ce2320eb2b322c1059266b201 > Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4103720 > Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> > Commit-Queue: Jamie Madill <jmadill@chromium.org> > Reviewed-by: Cody Northrop <cnorthrop@google.com> Bug: angleproject:7775 Change-Id: I29534b14c973fa34a4cb7457d534cd6156f33cd2 No-Presubmit: true No-Tree-Checks: true No-Try: true Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4178010 Auto-Submit: Jamie Madill <jmadill@chromium.org> Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com> Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>