Revert of Remove ScopedVector from all other codes in media/

chromecast/media/cdm/cast_cdm.cc

Index: chromecast/media/cdm/cast_cdm.cc
diff --git a/chromecast/media/cdm/cast_cdm.cc b/chromecast/media/cdm/cast_cdm.cc
index 53036590bab451759faacf4039e2542e900bcdd7..e0b02821f0dc143c2302b9b24077f524c5b6206c 100644
--- a/chromecast/media/cdm/cast_cdm.cc
+++ b/chromecast/media/cdm/cast_cdm.cc
@@ -127,7 +127,7 @@
   logging::LogMessage log_message(__FILE__, __LINE__, logging::LOG_INFO);
   log_message.stream() << "keystatuseschange ";
   int status_count[::media::CdmKeyInformation::KEY_STATUS_MAX] = {0};
-  for (const auto& key_info : keys_info) {
+  for (const auto* key_info : keys_info) {
     status_count[key_info->status]++;
   }
   for (int i = 0; i != ::media::CdmKeyInformation::KEY_STATUS_MAX; ++i) {
@@ -156,8 +156,10 @@
                                      ::media::CdmKeysInfo* keys_info) {
   DCHECK(keys_info);
   for (const std::pair<std::string, std::string>& key : keys) {
-    keys_info->push_back(base::MakeUnique<::media::CdmKeyInformation>(
-        key.first, ::media::CdmKeyInformation::USABLE, 0));
+    std::unique_ptr<::media::CdmKeyInformation> cdm_key_information(
+        new ::media::CdmKeyInformation(key.first,
+                                       ::media::CdmKeyInformation::USABLE, 0));
+    keys_info->push_back(cdm_key_information.release());
   }
 }