Implement SysInfo::HardwareModelName() on iOS.

This allows the hardware_class field in UMA to be populated on
iOS (with values like "iPhone9,3"), which will allow us to stop
sending those strings in the cpu_architecture field which is
what's currently being done.

BUG=370104

Review-Url: https://codereview.chromium.org/2860663005
Cr-Commit-Position: refs/heads/master@{#469499}


CrOS-Libchrome-Original-Commit: 666e5eec463d93e15876275e1a8a7538b7117746
3 files changed
tree: bd62e5056d3f8dd669882ad14b144cd449c3db65
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/