Bug 1324051 - Add highlights histogram telemetry r=Grisha

MozReview-Commit-ID: 92m8jYS8b8D

--HG--
extra : rebase_source : 7056ef9bc68c6bfb9c56f64f6c51be65a1419ed4

mobile/android/base/java/org/mozilla/gecko/db/LocalBrowserDB.java

@@ -110,6 +110,7 @@ public class LocalBrowserDB extends BrowserDB {
     public static final String HISTORY_VISITS_URL = "url";
 
     private static final String TELEMETRY_HISTOGRAM_ACTIVITY_STREAM_TOPSITES = "FENNEC_ACTIVITY_STREAM_TOPSITES_LOADER_TIME_MS";
+    private static final String TELEMETRY_HISTOGRAM_ACTIVITY_STREAM_HIGHLIGHTS = "FENNEC_ACTIVITY_STREAM_HIGHLIGHTS_LOADER_TIME_MS";
 
     private final Uri mBookmarksUriWithProfile;
     private final Uri mParentsUriWithProfile;
@@ -1979,7 +1980,8 @@ public class LocalBrowserDB extends BrowserDB {
                 .appendQueryParameter(BrowserContract.PARAM_LIMIT, String.valueOf(limit))
                 .build();
 
-        return new CursorLoader(context, uri, null, null, null, null);
+        return new TelemetrisedCursorLoader(context, uri, null, null, null, null,
+                TELEMETRY_HISTOGRAM_ACTIVITY_STREAM_HIGHLIGHTS);
     }
 
     @Override

toolkit/components/telemetry/Histograms.json

@@ -6308,6 +6308,17 @@
     "bug_numbers": [1293790],
     "cpp_guard": "ANDROID"
   },
+  "FENNEC_ACTIVITY_STREAM_HIGHLIGHTS_LOADER_TIME_MS": {
+    "expires_in_version": "never",
+    "kind": "exponential",
+    "low": 10,
+    "high": 20000,
+    "n_buckets": 20,
+    "description": "Time for the Activity Stream highlights query to return (ms)",
+    "alert_emails": ["mobile-frontend@mozilla.com"],
+    "bug_numbers": [1298786],
+    "cpp_guard": "ANDROID"
+  },
   "FENNEC_HOMEPANELS_CUSTOM": {
     "expires_in_version": "54",
     "kind": "boolean",