[DevTools] Filter any messages from previous sessions in DevToolsAgentHostImpl

content/browser/devtools/protocol/io_handler.h

 // Copyright 2015 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_IO_HANDLER_H_
 #define CONTENT_BROWSER_DEVTOOLS_PROTOCOL_IO_HANDLER_H_
 
 #include "base/memory/weak_ptr.h"
 #include "content/browser/devtools/protocol/devtools_protocol_dispatcher.h"
 
@@ skipping 10 matching lines @@
 class IOHandler {
  public:
   using Response = DevToolsProtocolClient::Response;
 
   explicit IOHandler(DevToolsIOContext* io_context);
   ~IOHandler();
 
   void SetClient(scoped_ptr<Client> client);
 
   // Protocol methods.
-  Response Read(DevToolsCommandId command_id, const std::string& handle,
-      const int* offset, const int* max_size);
+  Response Read(int session_id,
+                DevToolsCommandId command_id,
+                const std::string& handle,
+                const int* offset,
+                const int* max_size);
   Response Close(const std::string& handle);
 
  private:
-  void ReadComplete(DevToolsCommandId command_id,
-      const scoped_refptr<base::RefCountedString>& data, int status);
+  void ReadComplete(int session_id,
+                    DevToolsCommandId command_id,
+                    const scoped_refptr<base::RefCountedString>& data,
+                    int status);
 
   scoped_ptr<Client> client_;
   DevToolsIOContext* io_context_;
   base::WeakPtrFactory<IOHandler> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(IOHandler);
 };
 
 }  // namespace io
 }  // namespace devtools
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DEVTOOLS_PROTOCOL_TRACING_HANDLER_H_