Fix typos in num_failures_by_type for json results.

tools/telemetry/telemetry/unittest/json_results.py

Index: tools/telemetry/telemetry/unittest/json_results.py
diff --git a/tools/telemetry/telemetry/unittest/json_results.py b/tools/telemetry/telemetry/unittest/json_results.py
index a886746e54419d7b027606b13ddfa2e5dad52171..72c20f62ef11acc86d083e40825ad1023143244d 100644
--- a/tools/telemetry/telemetry/unittest/json_results.py
+++ b/tools/telemetry/telemetry/unittest/json_results.py
@@ -61,8 +61,8 @@ def _FullResults(suite, result, metadata):
   failed_test_names = _FailedTestNames(result)
 
   full_results['num_failures_by_type'] = {
-      'Failure': len(failed_test_names),
-      'Pass': len(all_test_names) - len(failed_test_names),
+      'FAIL': len(failed_test_names),
+      'PASS': len(all_test_names) - len(failed_test_names),
   }
 
   full_results['tests'] = {}