Bug 1401685 - Don't skip sending BHR ping if it is empty, r=froydnj

toolkit/components/backgroundhangmonitor/BHRTelemetryService.js

@@ -91,8 +91,7 @@ BHRTelemetryService.prototype = Object.freeze({
     // when running tests so that we run as much of BHR as possible (to catch
     // errors) while avoiding timeouts caused by invoking `pingsender` during
     // testing.
-    if (Services.prefs.getBoolPref("toolkit.telemetry.bhrPing.enabled", false) &&
-        this.payload.hangs.length > 0) {
+    if (Services.prefs.getBoolPref("toolkit.telemetry.bhrPing.enabled", false)) {
       this.payload.timeSinceLastPing = new Date() - this.startTime;
       TelemetryController.submitExternalPing("bhr", this.payload, {
         addEnvironment: true,