[DevTools] Filter any messages from previous sessions in DevToolsAgentHostImpl

content/browser/devtools/protocol/devtools_protocol_client.h

 // Copyright 2014 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_PROTOCOL_DEVTOOLS_PROTOCOL_CLIENT_H_
 #define CONTENT_BROWSER_DEVTOOLS_PROTOCOL_DEVTOOLS_PROTOCOL_CLIENT_H_
 
 #include "base/callback.h"
 #include "base/values.h"
 
 namespace content {
 
-using DevToolsCommandId = int;
+struct DevToolsCommandId {
+  static const int kNoId;
+
+  DevToolsCommandId(int call_id, int session_id)
+      : call_id(call_id), session_id(session_id) {}
+
+  int call_id;
+  int session_id;
+};
+
+class DevToolsProtocolDelegate;
+class DevToolsProtocolDispatcher;
 class DevToolsProtocolHandler;
-class DevToolsProtocolDispatcher;
 
 class DevToolsProtocolClient {
  public:
-  typedef base::Callback<void(const std::string& message)>
-      RawMessageCallback;
-  static const DevToolsCommandId kNoId;
-
   struct Response {
    public:
     static Response FallThrough();
     static Response OK();
     static Response InvalidParams(const std::string& param);
     static Response InternalError(const std::string& message);
     static Response ServerError(const std::string& message);
 
     int status() const;
     const std::string& message() const;
 
     bool IsFallThrough() const;
 
    private:
     friend class DevToolsProtocolHandler;
 
     explicit Response(int status);
     Response(int status, const std::string& message);
 
     int status_;
     std::string message_;
   };
 
   bool SendError(DevToolsCommandId command_id,
                  const Response& response);
 
-  // Sends message to client, the caller is presumed to properly
+  // Sends notification to client, the caller is presumed to properly
   // format the message. Do not use unless you must.
-  void SendRawMessage(const std::string& message);
+  void SendRawNotification(const std::string& message);
 
-  explicit DevToolsProtocolClient(
-      const RawMessageCallback& raw_message_callback);
+  void SendMessage(int session_id, const base::DictionaryValue& message);
+
+  explicit DevToolsProtocolClient(DevToolsProtocolDelegate* notifier);
   virtual ~DevToolsProtocolClient();
 
  protected:
   void SendSuccess(DevToolsCommandId command_id,
                    scoped_ptr<base::DictionaryValue> params);
   void SendNotification(const std::string& method,
                         scoped_ptr<base::DictionaryValue> params);
 
  private:
   friend class DevToolsProtocolDispatcher;
 
-  void SendMessage(const base::DictionaryValue& message);
-
-  RawMessageCallback raw_message_callback_;
+  DevToolsProtocolDelegate* notifier_;
   DISALLOW_COPY_AND_ASSIGN(DevToolsProtocolClient);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DEVTOOLS_PROTOCOL_DEVTOOLS_PROTOCOL_CLIENT_H_