Implement proxy for 3d-related interfaces

ppapi/proxy/interface_proxy.h

 // Copyright (c) 2010 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_INTERFACE_PROXY_H_
 #define PPAPI_PROXY_INTERFACE_PROXY_H_
 
 #include "base/basictypes.h"
 #include "ipc/ipc_channel.h"
 #include "ipc/ipc_message.h"
@@ skipping 27 matching lines @@
   bool is_target_proxy() const { return !!target_interface_; }
 
   // When this proxy is the "target" of the IPC communication (see
   // dispatcher.h), this target_interface pointer will indicate the local
   // side's interface pointer. This contains the functions that actually
   // implement the proxied interface.
   //
   // This will be NULL when this proxy is a source proxy.
   const void* target_interface() const { return target_interface_; }
 
-  Dispatcher* dispatcher() { return dispatcher_; }
+  Dispatcher* dispatcher() const { return dispatcher_; }
 
   // IPC::Message::Sender implementation.
   virtual bool Send(IPC::Message* msg);
 
   // Returns the local implementation of the interface that will proxy it to
   // the remote side. This is used on the source side only (see dispatcher.h).
   virtual const void* GetSourceInterface() const = 0;
 
   // Returns the interface ID associated with this proxy. Implemented by each
   // derived class to identify itself.
@@ skipping 17 matching lines @@
 
 inline bool PPBoolToBool(PP_Bool value) {
   return (PP_TRUE == value);
 }
 
 }  // namespace proxy
 }  // namespace pp
 
 #endif  // PPAPI_PROXY_INTERFACE_PROXY_H_