[CRD iOS] Branching internal and external implementations

remoting/ios/app/app_initializer.cc

 // Copyright 2017 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.
 
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
+#include "remoting/ios/app/app_initializer.h"
 
-#import <UIKit/UIKit.h>
-
-#include "base/at_exit.h"
 #include "base/command_line.h"
 #include "base/i18n/icu_util.h"
-#import "remoting/ios/app/app_delegate.h"
 
-int main(int argc, char* argv[]) {
-  // This class is designed to fulfill the dependents needs when it goes out of
-  // scope and gets destructed.
-  base::AtExitManager exitManager;
+namespace remoting {
 
+void InitializeIosClient(int argc, char* argv[]) {
   // Publicize the CommandLine.
   base::CommandLine::Init(argc, argv);
 
   // Required to find the ICU data file, used by some file_util routines.
   base::i18n::InitializeICU();
 
 #ifdef DEBUG
   // Set min log level for debug builds.  For some reason this has to be
   // negative.
   logging::SetMinLogLevel(-1);
 #endif
+}
 
-  @autoreleasepool {
-    return UIApplicationMain(
-        argc, argv, nil, NSStringFromClass([AppDelegate class]));
-  }
-}
+}  // namespace remoting