Move logic for uploading logs into a ReportingService object.

components/metrics/BUILD.gn

Index: components/metrics/BUILD.gn
diff --git a/components/metrics/BUILD.gn b/components/metrics/BUILD.gn
index a421b29bfc6dcb0031dbe2f74342948648a88d05..02efb99f67e1bf3bb8ca2286d0061a6f40c6c77e 100644
--- a/components/metrics/BUILD.gn
+++ b/components/metrics/BUILD.gn
@@ -54,6 +54,8 @@ static_library("metrics") {
     "metrics_reporting_default_state.h",
     "metrics_reporting_scheduler.cc",
     "metrics_reporting_scheduler.h",
+    "metrics_reporting_service.cc",
+    "metrics_reporting_service.h",
     "metrics_rotation_scheduler.cc",
     "metrics_rotation_scheduler.h",
     "metrics_scheduler.cc",
@@ -75,6 +77,8 @@ static_library("metrics") {
     "persisted_logs_metrics.h",
     "persisted_logs_metrics_impl.cc",
     "persisted_logs_metrics_impl.h",
+    "reporting_service.cc",
+    "reporting_service.h",
     "stability_metrics_helper.cc",
     "stability_metrics_helper.h",
     "stability_metrics_provider.cc",