Revert of Make classes and structures in web fast-allocated.

Source/web/WebDevToolsAgentImpl.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 56 matching lines @@
 class WebViewImpl;
 
 class WebDevToolsAgentImpl final
     : public NoBaseWillBeGarbageCollectedFinalized<WebDevToolsAgentImpl>
     , public WebDevToolsAgent
     , public InspectorStateClient
     , public InspectorTracingAgent::Client
     , public InspectorRuntimeAgent::Client
     , public InspectorFrontendChannel
     , private WebThread::TaskObserver {
-    WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED(WebDevToolsAgentImpl);
 public:
     static PassOwnPtrWillBeRawPtr<WebDevToolsAgentImpl> create(WebLocalFrameImpl*, WebDevToolsAgentClient*);
     ~WebDevToolsAgentImpl() override;
     void dispose();
     DECLARE_VIRTUAL_TRACE();
 
     void willBeDestroyed();
     WebDevToolsAgentClient* client() { return m_client; }
     InspectorOverlayImpl* overlay() const { return m_overlay.get(); }
     void flushPendingProtocolNotifications();
@@ skipping 74 matching lines @@
     typedef Vector<RefPtr<JSONObject>> NotificationQueue;
     NotificationQueue m_notificationQueue;
     String m_stateCookie;
 
     friend class DebuggerTask;
 };
 
 } // namespace blink
 
 #endif