For #4908: Adds metrics for send tab telemetry

app/metrics.yaml

@@ -852,6 +852,28 @@ sync_account:
     notification_emails:
     - fenix-core@mozilla.com
     expires: "2020-03-01"
+  send_tab:
+    type: event
+    description: >
+      A user sent the current tab to another FxA device
+    bugs:
+      - 4908
+    data_reviews:
+      - https://github.com/mozilla-mobile/fenix/pull/5106
+    notification_emails:
+      - fenix-core@mozilla.com
+    expires: "2020-03-01"
+  sign_in_to_send_tab:
+    type: event
+    description: >
+      A user pressed the "sign in to send tab" button inside the share tab menu
+    bugs:
+      - 4908
+    data_reviews:
+      - https://github.com/mozilla-mobile/fenix/pull/5106
+    notification_emails:
+      - fenix-core@mozilla.com
+    expires: "2020-03-01"
 
 history:
   opened:

docs/metrics.md

@@ -708,6 +708,22 @@ tracking_protection</td>
         <td></td>
         <td>2020-03-01</td>
     </tr>
+    <tr>
+        <td>send_tab</td>
+        <td>event</td>
+        <td>A user sent the current tab to another FxA device</td>
+        <td><a href="https://github.com/mozilla-mobile/fenix/pull/5106">link</a></td>
+        <td></td>
+        <td>2020-03-01</td>
+    </tr>
+    <tr>
+        <td>sign_in_to_send_tab</td>
+        <td>event</td>
+        <td>A user pressed the "sign in to send tab" button inside the share tab menu</td>
+        <td><a href="https://github.com/mozilla-mobile/fenix/pull/5106">link</a></td>
+        <td></td>
+        <td>2020-03-01</td>
+    </tr>
 </table>
 </pre>