Move more metrics classes to metrics namespace.

chrome/browser/browser_process.h

Index: chrome/browser/browser_process.h
diff --git a/chrome/browser/browser_process.h b/chrome/browser/browser_process.h
index fefc63f650c9933cf51b2da1a8965b2d1f59276a..df2ad5ea9106dee776ef9ffad002660a7101264a 100644
--- a/chrome/browser/browser_process.h
+++ b/chrome/browser/browser_process.h
@@ -28,7 +28,6 @@ class IconManager;
 class IntranetRedirectDetector;
 class IOThread;
 class MediaFileSystemRegistry;
-class MetricsService;
 class MetricsServicesManager;
 class NotificationUIManager;
 class PrefRegistrySimple;
@@ -63,6 +62,10 @@ namespace message_center {
 class MessageCenter;
 }
 
+namespace metrics {
+class MetricsService;
+}
+
 namespace net {
 class URLRequestContextGetter;
 }
@@ -115,7 +118,7 @@ class BrowserProcess {
   virtual MetricsServicesManager* GetMetricsServicesManager() = 0;
 
   // Services: any of these getters may return NULL
-  virtual MetricsService* metrics_service() = 0;
+  virtual metrics::MetricsService* metrics_service() = 0;
   virtual rappor::RapporService* rappor_service() = 0;
   virtual ProfileManager* profile_manager() = 0;
   virtual PrefService* local_state() = 0;