DevTools: use explicit IPC messages for enabling/disabling tracing instead of intercepting protocol…

content/browser/devtools/devtools_protocol.h

 // Copyright (c) 2013 The Chromium 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 CONTENT_BROWSER_DEVTOOLS_DEVTOOLS_PROTOCOL_H_
 #define CONTENT_BROWSER_DEVTOOLS_DEVTOOLS_PROTOCOL_H_
 
 #include <map>
 #include <string>
 
@@ skipping 109 matching lines @@
     Notification(const std::string& method,
                  base::DictionaryValue* params);
 
     DISALLOW_COPY_AND_ASSIGN(Notification);
   };
 
   class CONTENT_EXPORT Handler {
    public:
     typedef base::Callback<scoped_refptr<DevToolsProtocol::Response>(
         scoped_refptr<DevToolsProtocol::Command> command)> CommandHandler;
-    typedef base::Callback<void(
-        scoped_refptr<DevToolsProtocol::Notification> notification)>
-            NotificationHandler;
 
     virtual ~Handler();
 
     virtual scoped_refptr<DevToolsProtocol::Response> HandleCommand(
         scoped_refptr<DevToolsProtocol::Command> command);
 
-    virtual void HandleNotification(
-        scoped_refptr<DevToolsProtocol::Notification> notification);
-
     void SetNotifier(const Notifier& notifier);
 
    protected:
     Handler();
 
     void RegisterCommandHandler(const std::string& command,
                                 const CommandHandler& handler);
 
-    void RegisterNotificationHandler(const std::string& notification,
-                                     const NotificationHandler& handler);
-
     // Sends notification to the client. Takes ownership of |params|.
     void SendNotification(const std::string& method,
                           base::DictionaryValue* params);
 
     void SendAsyncResponse(scoped_refptr<DevToolsProtocol::Response> response);
 
     // Sends message to client, the caller is presumed to properly
     // format the message.
     void SendRawMessage(const std::string& message);
 
    private:
     typedef std::map<std::string, CommandHandler> CommandHandlers;
-    typedef std::map<std::string, NotificationHandler> NotificationHandlers;
 
     Notifier notifier_;
     CommandHandlers command_handlers_;
-    NotificationHandlers notification_handlers_;
 
     DISALLOW_COPY_AND_ASSIGN(Handler);
   };
 
   CONTENT_EXPORT static base::DictionaryValue* ParseMessage(
       const std::string& json,
       std::string* error_response);
 
   CONTENT_EXPORT static scoped_refptr<Command> ParseCommand(
       const std::string& json,
@@ skipping 17 matching lines @@
   static scoped_refptr<Notification> CreateNotification(
       const std::string& method, base::DictionaryValue* params);
 
   DevToolsProtocol() {}
   ~DevToolsProtocol() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DEVTOOLS_DEVTOOLS_PROTOCOL_H_