Remove ScopedVector in //component/metrics

chromecast/browser/metrics/external_metrics.cc

Index: chromecast/browser/metrics/external_metrics.cc
diff --git a/chromecast/browser/metrics/external_metrics.cc b/chromecast/browser/metrics/external_metrics.cc
index cc1164aafb4cf8bc1af6782640057c18c4a2469f..cae3138d2687436fc1cad2838c0d233a944f5f97 100644
--- a/chromecast/browser/metrics/external_metrics.cc
+++ b/chromecast/browser/metrics/external_metrics.cc
@@ -105,13 +105,11 @@ void ExternalMetrics::RecordSparseHistogram(
 }
 
 int ExternalMetrics::CollectEvents() {
-  ScopedVector< ::metrics::MetricSample> samples;
+  std::vector<std::unique_ptr<::metrics::MetricSample>> samples;
   ::metrics::SerializationUtils::ReadAndTruncateMetricsFromFile(
       uma_events_file_, &samples);
 
-  for (ScopedVector< ::metrics::MetricSample>::iterator it = samples.begin();
-       it != samples.end();
-       ++it) {
+  for (auto it = samples.begin(); it != samples.end(); ++it) {
     const ::metrics::MetricSample& sample = **it;
 
     switch (sample.type()) {