Move more metrics classes to metrics namespace.

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 c379704ad6f35baba5ba9319cc9a0d1650a7700b..4cdd0e1d83ca752c90abed3a8549201410dd3416 100644
--- a/chrome/browser/browser_process_impl.cc
+++ b/chrome/browser/browser_process_impl.cc
@@ -476,7 +476,7 @@ void BrowserProcessImpl::EndSession() {
   }
 
   // Tell the metrics service it was cleanly shutdown.
-  MetricsService* metrics = g_browser_process->metrics_service();
+  metrics::MetricsService* metrics = g_browser_process->metrics_service();
   if (metrics && local_state()) {
     metrics->RecordStartOfSessionEnd();
 #if !defined(OS_CHROMEOS)
@@ -532,7 +532,7 @@ MetricsServicesManager* BrowserProcessImpl::GetMetricsServicesManager() {
   return metrics_services_manager_.get();
 }
 
-MetricsService* BrowserProcessImpl::metrics_service() {
+metrics::MetricsService* BrowserProcessImpl::metrics_service() {
   DCHECK(CalledOnValidThread());
   return GetMetricsServicesManager()->GetMetricsService();
 }