Create a PPAPI host for new resource message routing.

ppapi/proxy/dispatcher.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 PPAPI_PROXY_DISPATCHER_H_
 #define PPAPI_PROXY_DISPATCHER_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 33 matching lines @@
 //    InterfaceProxy <---------------------- InterfaceProxy
 //                                      |
 class PPAPI_PROXY_EXPORT Dispatcher : public ProxyChannel {
  public:
   virtual ~Dispatcher();
 
   // Returns true if the dispatcher is on the plugin side, or false if it's the
   // browser side.
   virtual bool IsPlugin() const = 0;
 
+  void AddFilter(IPC::Channel::Listener* listener);
+
   VarSerializationRules* serialization_rules() const {
     return serialization_rules_.get();
   }
 
   // Returns a non-owning pointer to the interface proxy for the given ID, or
   // NULL if the ID isn't found. This will create the proxy if it hasn't been
   // created so far.
   InterfaceProxy* GetInterfaceProxy(ApiID id);
 
   // Returns the pointer to the IO thread for processing IPC messages.
@@ skipping 25 matching lines @@
   void SetSerializationRules(VarSerializationRules* var_serialization_rules);
 
   // Called when an invalid message is received from the remote site. The
   // default implementation does nothing, derived classes can override.
   virtual void OnInvalidMessageReceived();
 
   bool disallow_trusted_interfaces() const {
     return disallow_trusted_interfaces_;
   }
 
+ protected:
+  std::vector<IPC::Channel::Listener*> filters_;
+
  private:
   friend class HostDispatcherTest;
   friend class PluginDispatcherTest;
 
   // Lists all lazily-created interface proxies.
   scoped_ptr<InterfaceProxy> proxies_[API_ID_COUNT];
 
   bool disallow_trusted_interfaces_;
 
   PP_GetInterface_Func local_get_interface_;
 
   scoped_refptr<VarSerializationRules> serialization_rules_;
 
   DISALLOW_COPY_AND_ASSIGN(Dispatcher);
 };
 
 }  // namespace proxy
 }  // namespace ppapi
 
 #endif  // PPAPI_PROXY_DISPATCHER_H_