Reduce plugin_metrics_provider_ usage in MetricsService

chrome/browser/browser_process_impl.cc

Index: chrome/browser/browser_process_impl.cc
diff --git a/chrome/browser/browser_process_impl.cc b/chrome/browser/browser_process_impl.cc
index a4e35338f5b4770b9061a90354a08db991f6c901..83c62a174ff4e0a743a7b4a1c325f7eaf249b338 100644
--- a/chrome/browser/browser_process_impl.cc
+++ b/chrome/browser/browser_process_impl.cc
@@ -416,6 +416,11 @@ MetricsService* BrowserProcessImpl::metrics_service() {
   return GetMetricsServicesManager()->GetMetricsService();
 }
 
+PluginMetricsProvider* BrowserProcessImpl::plugin_metrics_provider() {
+  DCHECK(CalledOnValidThread());
+  return GetMetricsServicesManager()->GetPluginMetricsProvider();
+}
+
 rappor::RapporService* BrowserProcessImpl::rappor_service() {
   DCHECK(CalledOnValidThread());
   return GetMetricsServicesManager()->GetRapporService();