Properly prefix deviceName with device. for realtime events reporting.

Bug: 1088082
Change-Id: I3c8e3907d09ffd2f5f7c3f5652fafb1f0d47374b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2248606
Commit-Queue: Julian Pastarmov <pastarmovj@chromium.org>
Reviewed-by: Julian Pastarmov <pastarmovj@chromium.org>
Reviewed-by: Dominique Fauteux-Chapleau <domfc@chromium.org>
Reviewed-by: Roger Tawa <rogerta@chromium.org>
Cr-Commit-Position: refs/heads/master@{#779778}

components/policy/core/common/cloud/realtime_reporting_job_configuration.cc

@@ -43,7 +43,7 @@ const char RealtimeReportingJobConfiguration::kFailedUploadsKey[] =
 const char RealtimeReportingJobConfiguration::kPermanentFailedUploadsKey[] =
     "permanentFailedUploads";
 const char RealtimeReportingJobConfiguration::kEventIdKey[] = "eventId";
-const char RealtimeReportingJobConfiguration::kDeviceNameKey[] = "deviceName";
+const char RealtimeReportingJobConfiguration::kDeviceNameKey[] = "device.name";
 
 base::Value RealtimeReportingJobConfiguration::BuildReport(
     base::Value events,