[inspector] Avoid unneeded heap allocations

src/inspector/injected-script-native.h

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_INSPECTOR_INJECTEDSCRIPTNATIVE_H_
 #define V8_INSPECTOR_INJECTEDSCRIPTNATIVE_H_
 
 #include <vector>
 
 #include "src/inspector/protocol/Protocol.h"
@@ skipping 16 matching lines @@
   v8::Local<v8::Value> objectForId(int id);
 
   void releaseObjectGroup(const String16& groupName);
   String16 groupName(int objectId) const;
 
  private:
   void addObjectToGroup(int objectId, const String16& groupName);
 
   int m_lastBoundObjectId;
   v8::Isolate* m_isolate;
-  protocol::HashMap<int, std::unique_ptr<v8::Global<v8::Value>>>
-      m_idToWrappedObject;
+  protocol::HashMap<int, v8::Global<v8::Value>> m_idToWrappedObject;
   typedef protocol::HashMap<int, String16> IdToObjectGroupName;
   IdToObjectGroupName m_idToObjectGroupName;
   typedef protocol::HashMap<String16, std::vector<int>> NameToObjectGroup;
   NameToObjectGroup m_nameToObjectGroup;
 };
 
 }  // namespace v8_inspector
 
 #endif  // V8_INSPECTOR_INJECTEDSCRIPTNATIVE_H_