Fix translate namespace

components/translate/core/common/translate_metrics_unittest.cc

Index: components/translate/core/common/translate_metrics_unittest.cc
diff --git a/components/translate/core/common/translate_metrics_unittest.cc b/components/translate/core/common/translate_metrics_unittest.cc
index ff7b97411457b86ca4565ebc22aa071d412a2c68..04eac9f003eac053bd987abbb2a3b2d560cc6849 100644
--- a/components/translate/core/common/translate_metrics_unittest.cc
+++ b/components/translate/core/common/translate_metrics_unittest.cc
@@ -18,6 +18,8 @@ using base::SampleCountIterator;
 using base::StatisticsRecorder;
 using base::TimeTicks;
 
+namespace translate {
+
 namespace {
 
 const int kTrue = 1;
@@ -282,3 +284,5 @@ TEST(TranslateMetricsTest, ReportLanguageDetectionTime) {
   recorder.CheckValueInLogs(9.009);
   recorder.CheckTotalCount(1);
 }
+
+}  // namespace translate