Add support for multiple zygote fork delegates

content/app/content_main_runner.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 "content/public/app/content_main_runner.h"
 
 #include <stdlib.h>
 
 #include "base/allocator/allocator_extension.h"
 #include "base/at_exit.h"
 #include "base/command_line.h"
 #include "base/debug/debugger.h"
 #include "base/debug/trace_event.h"
 #include "base/files/file_path.h"
 #include "base/i18n/icu_util.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/memory/scoped_vector.h"
 #include "base/metrics/stats_table.h"
 #include "base/path_service.h"
 #include "base/process/launch.h"
 #include "base/process/memory.h"
 #include "base/process/process_handle.h"
 #include "base/profiler/alternate_timer.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "content/browser/browser_main.h"
@@ skipping 262 matching lines @@
               ContentMainDelegate* delegate) {
   static const MainFunction kMainFunctions[] = {
     { switches::kRendererProcess,    RendererMain },
     { switches::kWorkerProcess,      WorkerMain },
 #if defined(ENABLE_PLUGINS)
     { switches::kPpapiPluginProcess, PpapiPluginMain },
 #endif
     { switches::kUtilityProcess,     UtilityMain },
   };
 
-  scoped_ptr<ZygoteForkDelegate> zygote_fork_delegate;
+  ScopedVector<ZygoteForkDelegate> zygote_fork_delegates;
   if (delegate) {
-    zygote_fork_delegate.reset(delegate->ZygoteStarting());
+    delegate->ZygoteStarting(&zygote_fork_delegates);
     // Each Renderer we spawn will re-attempt initialization of the media
     // libraries, at which point failure will be detected and handled, so
     // we do not need to cope with initialization failures here.
     base::FilePath media_path;
     if (PathService::Get(DIR_MEDIA_LIBS, &media_path))
       media::InitializeMediaLibrary(media_path);
   }
 
   // This function call can return multiple times, once per fork().
-  if (!ZygoteMain(main_function_params, zygote_fork_delegate.get()))
+  if (!ZygoteMain(main_function_params, zygote_fork_delegates.Pass()))
     return 1;
 
   if (delegate) delegate->ZygoteForked();
 
   // Zygote::HandleForkRequest may have reallocated the command
   // line so update it here with the new version.
   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
   std::string process_type =
       command_line.GetSwitchValueASCII(switches::kProcessType);
   ContentClientInitializer::Set(process_type, delegate);
@@ skipping 475 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(ContentMainRunnerImpl);
 };
 
 // static
 ContentMainRunner* ContentMainRunner::Create() {
   return new ContentMainRunnerImpl();
 }
 
 }  // namespace content