Move VariationsParamAssociator to base

Moves VariationsParamAssociator to base as FieldTrialParamAssociator
and just reroutes the calls in variations_associated_data.cc to this
new class in field_trial_param_associator.h/.cc. This is so we can eventually get field trial parameters into child processes using shared memory.

BUG=660038

Review-Url: https://codereview.chromium.org/2456723004
Cr-Commit-Position: refs/heads/master@{#428710}


CrOS-Libchrome-Original-Commit: 5d5ac0c30be692e2e918121e140a869af36f8dc2
2 files changed
tree: 506fe0527674ab046d41803a40090b5f2a127b4f
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/