Convert ContentMain to take a struct instead of parameters that vary depending on the platform.

content/app/content_main.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.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "content/public/app/content_main_runner.h"
 
 namespace content {
 
-#if defined(OS_WIN)
-int ContentMain(HINSTANCE instance,
-                sandbox::SandboxInterfaceInfo* sandbox_info,
-                ContentMainDelegate* delegate) {
-#else
-int ContentMain(int argc,
-                const char** argv,
-                ContentMainDelegate* delegate) {
-#endif  // OS_WIN
-
+int ContentMain(const ContentMainParams& params) {
   scoped_ptr<ContentMainRunner> main_runner(ContentMainRunner::Create());
 
-  int exit_code;
-
-#if defined(OS_WIN)
-  exit_code = main_runner->Initialize(instance, sandbox_info, delegate);
-#else
-  exit_code = main_runner->Initialize(argc, argv, delegate);
-#endif  // OS_WIN
-
+  int exit_code = main_runner->Initialize(params);
   if (exit_code >= 0)
     return exit_code;
 
   exit_code = main_runner->Run();
 
   main_runner->Shutdown();
 
   return exit_code;
 }
 
 }  // namespace content