Extract debugger target enumeration into a separate class

content/public/browser/devtools_http_handler.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_HTTP_HANDLER_H_
 #define CONTENT_PUBLIC_BROWSER_DEVTOOLS_HTTP_HANDLER_H_
 
 #include <string>
 
 #include "content/common/content_export.h"
 
 class GURL;
 
 namespace net {
 class StreamListenSocketFactory;
 class URLRequestContextGetter;
 }
 
 namespace content {
 
 class DevToolsAgentHost;
+class DevToolsAgentHostBinding;
 class DevToolsHttpHandlerDelegate;
 
 // This class is used for managing DevTools remote debugging server.
 // Clients can connect to the specified ip:port and start debugging
 // this browser.
 class DevToolsHttpHandler {
  public:
-  // Interface responsible for mapping DevToolsAgentHost instances to/from
-  // string identifiers.
-  class DevToolsAgentHostBinding {
-   public:
-    virtual ~DevToolsAgentHostBinding() {}
-
-    // Returns the mapping of DevToolsAgentHost to identifier.
-    virtual std::string GetIdentifier(DevToolsAgentHost* agent_host) = 0;
-
-    // Returns the mapping of identifier to DevToolsAgentHost.
-    virtual DevToolsAgentHost* ForIdentifier(const std::string& identifier) = 0;
-  };
-
   // Returns frontend resource id for the given resource |name|.
   CONTENT_EXPORT static int GetFrontendResourceId(
       const std::string& name);
 
   // Takes ownership over |socket_factory| and |delegate|.
   CONTENT_EXPORT static DevToolsHttpHandler* Start(
       const net::StreamListenSocketFactory* socket_factory,
       const std::string& frontend_url,
       DevToolsHttpHandlerDelegate* delegate);
 
   // Called from the main thread in order to stop protocol handler.
   // Automatically destroys the handler instance.
   virtual void Stop() = 0;
 
   // Set the DevToolsAgentHostBinding instance. If no instance is provided the
   // default implementation will be used.
   virtual void SetDevToolsAgentHostBinding(
       DevToolsAgentHostBinding* binding) = 0;
 
   // Returns the URL for the address to debug |render_view_host|.
   virtual GURL GetFrontendURL(DevToolsAgentHost* agent_host) = 0;
 
  protected:
   virtual ~DevToolsHttpHandler() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_DEVTOOLS_HTTP_HANDLER_H_