Move more metrics classes to metrics namespace.

BUG=374763
TBR=jam@chromium.org

Review URL: https://codereview.chromium.org/502173002

Cr-Commit-Position: refs/heads/master@{#291994}


CrOS-Libchrome-Original-Commit: cbd420738577e75f86d88d81da65661b588aa950
1 file changed
tree: ca27252919ab13a961f54b2280bf250b7f1833a2
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/