Bug 1463104 - Instrument inspection of object expansion in the Web Console with event telemetry; r=miker.

This only adds the event in Events.yaml,
the actual work will happen in Github.

MozReview-Commit-ID: 4GDMiGxyp4U

--HG--
extra : rebase_source : 7470f07be10882e731c8a7e95c2d6d28210aeba9

toolkit/components/telemetry/Events.yaml

@@ -651,5 +651,15 @@ devtools.main:
     description: User has clicked "Jump to definition" icon (next to logged functions) in the web console.
     release_channel_collection: opt-out
     expiry_version: never
+    extra_keys:
+      session_id: The start time of the session in milliseconds since epoch (Unix Timestamp) e.g. 1396381378123.
+  object_expanded:
+    objects: ["webconsole"]
+    bug_numbers: [1463104]
+    notification_emails: ["dev-developer-tools@lists.mozilla.org", "hkirschner@mozilla.com"]
+    record_in_processes: ["main"]
+    description: User has expanded an object in the web console.
+    release_channel_collection: opt-out
+    expiry_version: never
     extra_keys:
       session_id: The start time of the session in milliseconds since epoch (Unix Timestamp) e.g. 1396381378123.