Change UMA proto product field to be an int32.

components/metrics/test_metrics_service_client.cc

Index: components/metrics/test_metrics_service_client.cc
diff --git a/components/metrics/test_metrics_service_client.cc b/components/metrics/test_metrics_service_client.cc
index e5e97780ec0fad9d4688c0198397ff70908363b1..f9fab4875c01dc30a99ab328d25c316631ca1204 100644
--- a/components/metrics/test_metrics_service_client.cc
+++ b/components/metrics/test_metrics_service_client.cc
@@ -6,6 +6,7 @@
 
 #include "base/callback.h"
 #include "components/metrics/metrics_log_uploader.h"
+#include "components/metrics/proto/chrome_user_metrics_extension.pb.h"
 
 namespace metrics {
 
@@ -28,6 +29,10 @@ bool TestMetricsServiceClient::IsOffTheRecordSessionActive() {
   return false;
 }
 
+int32 TestMetricsServiceClient::GetProduct() {
+  return ChromeUserMetricsExtension::CHROME;
+}
+
 std::string TestMetricsServiceClient::GetApplicationLocale() {
   return "en-US";
 }