[CoC] Update code-of-conduct

CoC has now better contact avenues if submitter is uncomfortable with
a "blind" community@ account - two direct e-mails added.

It also now offers a way to send anonymous reports.

R=ben@chromium.org
BUG=none

Review-Url: https://codereview.chromium.org/2273433002
Cr-Commit-Position: refs/heads/master@{#414625}

CODE_OF_CONDUCT.md

@@ -37,6 +37,17 @@ confidential. In cases where a public response is deemed necessary, the
 identities of victims and reporters will remain confidential unless those
 individuals instruct us otherwise.
 
+If you are uncomfortable speaking up, or feel that your concerns are not being
+duly considered, you can email community@chromium.org, dknox@google.com, or
+groby@chromium.org to request involvement from a community manager. All
+concerns shared with community managers will be kept confidential, but you may
+also submit an anonymous report [here](https://docs.google.com/a/google.com/forms/d/e/1FAIpQLSe-LDjW9eIJ-TpI2poZxnGtU-SvUWkFZc8x0aiKGY1s7NKPdA/viewform?c=0&w=1).
+Please note that without a way to contact you, an anonymous report may be
+difficult to act on. You may also create a throwaway account to report. In
+cases where a public response is deemed necessary, the identities of victims
+and reporters will remain confidential unless those individuals instruct us
+otherwise.
+
 While all reports will be taken seriously, the Chromium community managers may
 not act on complaints that they feel are not violations of this code of
 conduct.