Remove usage of USE_SYSTEM_PROTOBUF

It's no longer possible to build using the system libprotobuf, so the
macro USE_SYSTEM_PROTOBUF is not set anywhere.  This CL removes all
usages of it.

R=jam@chromium.org

Review-Url: https://codereview.chromium.org/2748203002
Cr-Commit-Position: refs/heads/master@{#462363}


CrOS-Libchrome-Original-Commit: 4b7c48089ce5ee9d1a2e4530a82f6bd31e398bbd
1 file changed
tree: 15276a050acc88b0d3289e14d3fe8ee8ff11ce5d
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/