Convert //chrome/installer from scoped_ptr to std::unique_ptr

chrome/browser/google/google_update_settings_posix.cc

Index: chrome/browser/google/google_update_settings_posix.cc
diff --git a/chrome/browser/google/google_update_settings_posix.cc b/chrome/browser/google/google_update_settings_posix.cc
index a03d9acc01630e5008f54b549c03b34106f95f24..059672e939a0f31b00b125bb9123fa5ba697267d 100644
--- a/chrome/browser/google/google_update_settings_posix.cc
+++ b/chrome/browser/google/google_update_settings_posix.cc
@@ -94,12 +94,13 @@ bool GoogleUpdateSettings::SetCollectStatsConsent(bool consented) {
 
 // static
 // TODO(gab): Implement storing/loading for all ClientInfo fields on POSIX.
-scoped_ptr<metrics::ClientInfo> GoogleUpdateSettings::LoadMetricsClientInfo() {
-  scoped_ptr<metrics::ClientInfo> client_info(new metrics::ClientInfo);
+std::unique_ptr<metrics::ClientInfo>
+GoogleUpdateSettings::LoadMetricsClientInfo() {
+  std::unique_ptr<metrics::ClientInfo> client_info(new metrics::ClientInfo);
 
   base::AutoLock lock(g_posix_client_id_lock.Get());
   if (g_posix_client_id.Get().empty())
-    return scoped_ptr<metrics::ClientInfo>();
+    return nullptr;
   client_info->client_id = g_posix_client_id.Get();
 
   return client_info;