Revert 163282 "PartitionAllocTest.MappingCollision still not wor..."
Revert 163282 "PartitionAllocTest.MappingCollision still not wor..."

> PartitionAllocTest.MappingCollision still not working on Windows.
> 
> Disable it.
> 
> TBR=tsepez@chromium.org
> NOTRY=true
> 
> Review URL: https://codereview.chromium.org/106743004

TBR=cevans@chromium.org

Review URL: https://codereview.chromium.org/108703002

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@163357 bbb929c8-8fbe-4397-9dbb-9b2b20218538

primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs