fix test

Author: islandryu

src/inspector/dom_storage_agent.h

@@ -51,9 +51,9 @@ class DOMStorageAgent : public protocol::DOMStorage::Backend,
 
  private:
   std::unique_ptr<protocol::DOMStorage::Frontend> frontend_;
-  std::unordered_map<std::string, std::string> local_storage_map_;
-  std::unordered_map<std::string, std::string> session_storage_map_;
-  bool enabled_;
+  std::unordered_map<std::string, std::string> local_storage_map_ = {};
+  std::unordered_map<std::string, std::string> session_storage_map_ = {};
+  bool enabled_ = false;
   Environment* env_;
 };