Bug 1604818 - Add SCROLL_PRESENT_LATENCY probe to Glean yaml r=Dexter

Differential Revision: https://phabricator.services.mozilla.com/D57820

--HG--
extra : moz-landing-system : lando

toolkit/components/telemetry/Histograms.json

@@ -1712,7 +1712,7 @@
   },
   "SCROLL_PRESENT_LATENCY": {
     "record_in_processes": ["main", "gpu"],
-    "products": ["firefox", "fennec", "geckoview"],
+    "products": ["firefox", "geckoview_streaming"],
     "alert_emails": [ "perfteam@mozilla.com", "sefeng@mozilla.com", "vchin@mozilla.com" ],
     "expires_in_version": "never",
     "kind": "exponential",
@@ -1721,7 +1721,7 @@
     "high": 20000,
     "n_buckets": 100,
     "description": "Time between receiving a scroll event on the event loop and compositing its result onto the screen (ms)",
-    "bug_numbers": [ 1500465 ]
+    "bug_numbers": [1500465, 1604818]
   },
   "CANVAS_2D_USED": {
     "record_in_processes": ["main", "content"],

toolkit/components/telemetry/geckoview/streaming/metrics.yaml

@@ -127,6 +127,23 @@ gfx:
       - jnicol@mozilla.com
     expires: never
 
+  scroll_present_latency:
+    type: timing_distribution
+    time_unit: millisecond
+    description: >
+      Time between receiving a scroll
+      event on the event loop and compositing
+      its result onto the screen (ms).
+    gecko_datapoint: SCROLL_PRESENT_LATENCY
+    bugs:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1604818
+    data_reviews:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1604818#c4
+    notification_emails:
+      - sefeng@mozilla.com
+      - perfteam@mozilla.com
+    expires: never
+
 gfx.checkerboard:
   duration:
     type: timing_distribution