metrics: Add more log messages to uploader

TEST=compiled
BUG=none

Change-Id: Iee49b104d0b6214e035f70fa108ae7464bd7988f
Reviewed-on: https://chromium-review.googlesource.com/217338
Reviewed-by: Bertrand Simonnet <bsimonnet@chromium.org>
Tested-by: Nathan Bullock <nathanbullock@google.com>
Commit-Queue: Nathan Bullock <nathanbullock@google.com>
diff --git a/metrics/metrics_daemon.cc b/metrics/metrics_daemon.cc
index c0c77fa..b8d013d 100644
--- a/metrics/metrics_daemon.cc
+++ b/metrics/metrics_daemon.cc
@@ -313,6 +313,7 @@
       g_timeout_add(kUpdateStatsIntervalMs, &HandleUpdateStatsTimeout, this);
 
   if (uploader_active) {
+    LOG(INFO) << "uploader enabled";
     upload_service_.reset(new UploadService(testing_));
     upload_service_->Init();
   }
diff --git a/metrics/uploader/upload_service.cc b/metrics/uploader/upload_service.cc
index 8e08f28..3266a8e 100644
--- a/metrics/uploader/upload_service.cc
+++ b/metrics/uploader/upload_service.cc
@@ -97,6 +97,8 @@
       return;
     }
     LOG(WARNING) << "log failed more than " << kMaxFailedUpload << " times.";
+  } else {
+    LOG(INFO) << "uploaded " << log_text.length() << " bytes";
   }
   // Discard staged log.
   staged_log_.reset();