Fix cctest/test-unboxed-doubles/IncrementalWriteBarrierObjectShiftFieldsRight after 5e87a0.
Fix cctest/test-unboxed-doubles/IncrementalWriteBarrierObjectShiftFieldsRight after 5e87a0.

Make sure that when manual evacuation candidate selection is enabled we do not select more pages than requested.
BUG=

TBR=hpayer@chromium.org

Review URL: https://codereview.chromium.org/1157293002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#28662}

UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh