This CL restricts the workaround to the trace perf tests. These trace
tests are too big to optimize.

Also includes a fix for a 32-bit Windows warnings. We'll need to update
the build file to remove a suppression once the traces are updated.

Bug: angleproject:3630
Change-Id: Id13a0050fc2a645aa572b8c9079908023b232f28
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2103084
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Cody Northrop <cnorthrop@google.com>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>