Revert of Change base::Value::ListStorage to std::vector<base::Value>

chrome/test/chromedriver/performance_logger.cc

Index: chrome/test/chromedriver/performance_logger.cc
diff --git a/chrome/test/chromedriver/performance_logger.cc b/chrome/test/chromedriver/performance_logger.cc
index 23d94e91549fc7e2543ad803ae03ac4a04ef345b..d7f61c545c3f325dee386e258b458a94b61a6b16 100644
--- a/chrome/test/chromedriver/performance_logger.cc
+++ b/chrome/test/chromedriver/performance_logger.cc
@@ -190,8 +190,8 @@
                     "received DevTools trace data in unexpected format");
     }
     for (const auto& trace : *traces) {
-      const base::DictionaryValue* event_dict;
-      if (!trace.GetAsDictionary(&event_dict))
+      base::DictionaryValue* event_dict;
+      if (!trace->GetAsDictionary(&event_dict))
         return Status(kUnknownError, "trace event must be a dictionary");
       AddLogEntry(client->GetId(), "Tracing.dataCollected", *event_dict);
     }