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

content/browser/tracing/background_tracing_config_impl.cc

Index: content/browser/tracing/background_tracing_config_impl.cc
diff --git a/content/browser/tracing/background_tracing_config_impl.cc b/content/browser/tracing/background_tracing_config_impl.cc
index b5d5c9afaa0e6e79f0d8168481981edc0bd8545f..3ce2fabf09258acd2e29de7783fadd6556c775a4 100644
--- a/content/browser/tracing/background_tracing_config_impl.cc
+++ b/content/browser/tracing/background_tracing_config_impl.cc
@@ -233,7 +233,7 @@
 
   for (const auto& it : *configs_list) {
     const base::DictionaryValue* config_dict = nullptr;
-    if (!it.GetAsDictionary(&config_dict))
+    if (!it->GetAsDictionary(&config_dict))
       return nullptr;
 
     config->AddPreemptiveRule(config_dict);
@@ -259,7 +259,7 @@
 
   for (const auto& it : *configs_list) {
     const base::DictionaryValue* config_dict = nullptr;
-    if (!it.GetAsDictionary(&config_dict))
+    if (!it->GetAsDictionary(&config_dict))
       return nullptr;
 
     std::string category_preset_string;