[DevTools] Support multiple clients in DevToolsAgentHost

content/public/browser/devtools_agent_host.h

 // Copyright (c) 2012 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_PUBLIC_BROWSER_DEVTOOLS_AGENT_HOST_H_
 #define CONTENT_PUBLIC_BROWSER_DEVTOOLS_AGENT_HOST_H_
 
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 126 matching lines @@
   static void RemoveObserver(DevToolsAgentHostObserver*);
 
   // Attaches |client| to this agent host to start debugging.
   // Returns true iff attach succeeded.
   virtual bool AttachClient(DevToolsAgentHostClient* client) = 0;
 
   // Attaches |client| to this agent host to start debugging. Disconnects
   // any existing clients.
   virtual void ForceAttachClient(DevToolsAgentHostClient* client) = 0;
 
+  // Attaches |client| to this agent host to start debugging. This method
+  // can attach more than one client (as opposite to AttachClient).
+  // Returns true iff attach succeeded.
+  virtual bool AttachMultiClient(DevToolsAgentHostClient* client) = 0;
+
   // Already attached client detaches from this agent host to stop debugging it.
   // Returns true iff detach succeeded.
   virtual bool DetachClient(DevToolsAgentHostClient* client) = 0;
 
   // Returns true if there is a client attached.
   virtual bool IsAttached() = 0;
 
   // Sends |message| from |client| to the agent.
   // Returns true if the message is dispatched and handled.
   virtual bool DispatchProtocolMessage(DevToolsAgentHostClient* client,
@@ skipping 57 matching lines @@
   static void DetachAllClients();
 
  protected:
   friend class base::RefCounted<DevToolsAgentHost>;
   virtual ~DevToolsAgentHost() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_DEVTOOLS_AGENT_HOST_H_