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

chrome/service/service_utility_process_host.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/service/service_utility_process_host.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/logging.h"
@@ skipping 134 matching lines @@
 
 FilePath ServiceUtilityProcessHost::GetUtilityProcessCmd() {
 #if defined(OS_LINUX)
   int flags = ChildProcessHost::CHILD_ALLOW_SELF;
 #else
   int flags = ChildProcessHost::CHILD_NORMAL;
 #endif
   return ChildProcessHost::GetChildPath(flags);
 }
 
-bool ServiceUtilityProcessHost::CanShutdown() {
-  return true;
-}
-
 void ServiceUtilityProcessHost::OnChildDisconnected() {
   if (waiting_for_reply_) {
     // If we are yet to receive a reply then notify the client that the
     // child died.
     client_message_loop_proxy_->PostTask(
         FROM_HERE, base::Bind(&Client::OnChildDied, client_.get()));
   }
   delete this;
 }
 
-void ServiceUtilityProcessHost::ShutdownStarted() {
-}
-
 bool ServiceUtilityProcessHost::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(ServiceUtilityProcessHost, message)
     IPC_MESSAGE_HANDLER(
         ChromeUtilityHostMsg_RenderPDFPagesToMetafile_Succeeded,
         OnRenderPDFPagesToMetafileSucceeded)
     IPC_MESSAGE_HANDLER(ChromeUtilityHostMsg_RenderPDFPagesToMetafile_Failed,
                         OnRenderPDFPagesToMetafileFailed)
     IPC_MESSAGE_HANDLER(
         ChromeUtilityHostMsg_GetPrinterCapsAndDefaults_Succeeded,
@@ skipping 63 matching lines @@
   printing::Emf metafile;
   if (!metafile.InitFromFile(metafile_path)) {
     OnRenderPDFPagesToMetafileFailed();
   } else {
     OnRenderPDFPagesToMetafileSucceeded(metafile,
                                         highest_rendered_page_number);
   }
 #endif  // defined(OS_WIN)
 }