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

base/trace_event/trace_event_argument.cc

Index: base/trace_event/trace_event_argument.cc
diff --git a/base/trace_event/trace_event_argument.cc b/base/trace_event/trace_event_argument.cc
index 646b1f2168794fca6ec2108b085b1014a2205830..db702b6231e5249c9526d27ac439450c732e39a6 100644
--- a/base/trace_event/trace_event_argument.cc
+++ b/base/trace_event/trace_event_argument.cc
@@ -289,7 +289,7 @@
       value.GetAsList(&list_value);
       BeginArrayWithCopiedName(name);
       for (const auto& base_value : *list_value)
-        AppendBaseValue(base_value);
+        AppendBaseValue(*base_value);
       EndArray();
     } break;
   }
@@ -343,7 +343,7 @@
       value.GetAsList(&list_value);
       BeginArray();
       for (const auto& base_value : *list_value)
-        AppendBaseValue(base_value);
+        AppendBaseValue(*base_value);
       EndArray();
     } break;
   }
@@ -369,11 +369,9 @@
           cur_dict = new_dict;
         } else {
           cur_list->Append(WrapUnique(new_dict));
-          // |new_dict| is invalidated at this point, so |cur_dict| needs to be
-          // reset.
-          cur_list->GetDictionary(cur_list->GetSize() - 1, &cur_dict);
           stack.push_back(cur_list);
           cur_list = nullptr;
+          cur_dict = new_dict;
         }
       } break;
 
@@ -398,8 +396,7 @@
         } else {
           cur_list->Append(WrapUnique(new_list));
           stack.push_back(cur_list);
-          // |cur_list| is invalidated at this point, so it needs to be reset.
-          cur_list->GetList(cur_list->GetSize() - 1, &cur_list);
+          cur_list = new_list;
         }
       } break;