Add traces for main omnibox providers

Add trace events for main omnibox providers. They are useful when
analyzing problems with omnibox slow response and lagginess while
typing, like issue 178705.

Committed: https://crrev.com/46959e833a3bfedbd783f829094a0824e756ee65
Cr-Commit-Position: refs/heads/master@{#381913}

Review URL: https://codereview.chromium.org/1805363002

Cr-Commit-Position: refs/heads/master@{#383360}


CrOS-Libchrome-Original-Commit: dd768d54bd4a775b8b9f17819f1535ed643d8c8b
1 file changed
tree: d0d4cd5c2c08c16199517af38a70ff423931623d
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/