Chromecast buildfix: MetricsService has moved to metrics namespace.

chromecast/metrics/cast_metrics_service_client.h

Index: chromecast/metrics/cast_metrics_service_client.h
diff --git a/chromecast/metrics/cast_metrics_service_client.h b/chromecast/metrics/cast_metrics_service_client.h
index 5ad791d9aa98c16365fc95eceb1c02290dfdc4a6..695a6ac8b93d64beb54201bfb7eb62947e8cce27 100644
--- a/chromecast/metrics/cast_metrics_service_client.h
+++ b/chromecast/metrics/cast_metrics_service_client.h
@@ -12,10 +12,10 @@
 #include "base/memory/scoped_ptr.h"
 #include "components/metrics/metrics_service_client.h"
 
-class MetricsService;
 class PrefService;
 
 namespace metrics {
+class MetricsService;
 class MetricsStateManager;
 }  // namespace metrics
 
@@ -62,7 +62,7 @@ class CastMetricsServiceClient : public ::metrics::MetricsServiceClient {
   bool IsReportingEnabled();
 
   scoped_ptr< ::metrics::MetricsStateManager> metrics_state_manager_;
-  scoped_ptr<MetricsService> metrics_service_;
+  scoped_ptr< ::metrics::MetricsService> metrics_service_;
   net::URLRequestContextGetter* request_context_;
 
   DISALLOW_COPY_AND_ASSIGN(CastMetricsServiceClient);