Fix CPD upload script --input-results-file description

No-Try: True
No-Presubmit: True
Bug: None
Change-Id: Id797c42b38a8cbe2cd998897768734aea9c11484
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/224460
Commit-Queue: Andrey Logvin <landrey@webrtc.org>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34394}
diff --git a/tools_webrtc/perf/webrtc_dashboard_upload.py b/tools_webrtc/perf/webrtc_dashboard_upload.py
index a709af5..19db025 100644
--- a/tools_webrtc/perf/webrtc_dashboard_upload.py
+++ b/tools_webrtc/perf/webrtc_dashboard_upload.py
@@ -50,7 +50,8 @@
                         help='Which dashboard to use.')
     parser.add_argument('--input-results-file', type=argparse.FileType(),
                         required=True,
-                        help='A JSON file with output from WebRTC tests.')
+                        help='A HistogramSet proto file with output from '
+                        'WebRTC tests.')
     parser.add_argument('--output-json-file', type=argparse.FileType('w'),
                         help='Where to write the output (for debugging).')
     parser.add_argument('--outdir', required=True,