Clarifications to network bug triage process.

Specfiically:
* Highlight top level responsibilities.
* Clarify detailed responsibilities around data gathering, filing crasher bugs, and monitoring Gasper/UMA.

BUG=None
R=mmenke@chromium.org

Review URL: https://codereview.chromium.org/970953002

Cr-Commit-Position: refs/heads/master@{#319903}
2 files changed