Add a Content API around BrowserChildProcessHost, similar to what was done with ChildProcessHost....

chrome/browser/nacl_host/nacl_broker_service_win.cc

 // Copyright (c) 2011 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 "chrome/browser/nacl_host/nacl_broker_service_win.h"
 
 #include "chrome/browser/nacl_host/nacl_process_host.h"
+#include "content/public/browser/browser_child_process_host_iterator.h"
+
+using content::BrowserChildProcessHostIterator;
 
 NaClBrokerService* NaClBrokerService::GetInstance() {
   return Singleton<NaClBrokerService>::get();
 }
 
 NaClBrokerService::NaClBrokerService()
     : loaders_running_(0) {
 }
 
 bool NaClBrokerService::StartBroker() {
@@ skipping 37 matching lines @@
 void NaClBrokerService::OnLoaderDied() {
   --loaders_running_;
   // Stop the broker only if there are no loaders running or being launched.
   NaClBrokerHost* broker_host = GetBrokerHost();
   if (loaders_running_ + pending_launches_.size() == 0 && broker_host != NULL) {
     broker_host->StopBroker();
   }
 }
 
 NaClBrokerHost* NaClBrokerService::GetBrokerHost() {
-  BrowserChildProcessHost::Iterator iter(content::PROCESS_TYPE_NACL_BROKER);
+  BrowserChildProcessHostIterator iter(content::PROCESS_TYPE_NACL_BROKER);
   if (iter.Done())
     return NULL;
-  NaClBrokerHost* broker_host = static_cast<NaClBrokerHost*>(*iter);
-  return broker_host;
+  return static_cast<NaClBrokerHost*>(iter.GetDelegate());
 }