Move base/numerics compiler-specific intrinsics to their own file

Splits the optimized builtins into their own file, which creates the
interfaces for adding the optimized ARM versions in a follow-up CL.

BUG=672489

Change-Id: I356fb4d166f4773b111f3c61c6206e3d4b4ccd40
Reviewed-on: https://chromium-review.googlesource.com/562754
Reviewed-by: Justin Schuh <jschuh@chromium.org>
Reviewed-by: Emil A Eklund <eae@chromium.org>
Commit-Queue: Justin Schuh <jschuh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#485500}

CrOS-Libchrome-Original-Commit: 48b272671a15f02ae84cfb147c793467731eeb5f
5 files changed
tree: 19f8debba1aa39d4bbb0da4485ebb4521963b33d
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/