Broker out PPAPI handle duplication

ppapi/proxy/dispatcher.cc

 // 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.
 
 #include "ppapi/proxy/dispatcher.h"
 
 #include <string.h>  // For memset.
 
 #include <map>
 
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "base/memory/singleton.h"
 #include "ppapi/proxy/ppapi_messages.h"
 #include "ppapi/proxy/var_serialization_rules.h"
 
 namespace ppapi {
 namespace proxy {
 
-Dispatcher::Dispatcher(base::ProcessHandle remote_process_handle,
-                       PP_GetInterface_Func local_get_interface)
-    : ProxyChannel(remote_process_handle),
-      disallow_trusted_interfaces_(false),  // TODO(brettw) make this settable.
+Dispatcher::Dispatcher(PP_GetInterface_Func local_get_interface)
+    : disallow_trusted_interfaces_(false),  // TODO(brettw) make this settable.
       local_get_interface_(local_get_interface) {
 }
 
 Dispatcher::~Dispatcher() {
 }
 
 InterfaceProxy* Dispatcher::GetInterfaceProxy(ApiID id) {
   InterfaceProxy* proxy = proxies_[id].get();
   if (!proxy) {
     // Handle the first time for a given API by creating the proxy for it.
@@ skipping 40 matching lines @@
 void Dispatcher::SetSerializationRules(
     VarSerializationRules* var_serialization_rules) {
   serialization_rules_ = var_serialization_rules;
 }
 
 void Dispatcher::OnInvalidMessageReceived() {
 }
 
 }  // namespace proxy
 }  // namespace ppapi