Move wtf/BitwiseOperations.h into base/bits.h.

Part of the plan for WTF, and supports the PartitionAllocator move as well.

BUG=632441
R=dcheng@chromium.org, esprehn@chromium.org

Review URL: https://codereview.chromium.org/2512593002 .

Cr-Commit-Position: refs/heads/master@{#433301}
6 files changed