[Clean Skeleton] Migrate code to clean/

ios/chrome/app/main.mm

-// Copyright 2016 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.
-
-// ======                        New Architecture                         =====
-// =         This code is only used in the new iOS Chrome architecture.       =
-// ============================================================================
-
-#import <UIKit/UIKit.h>
-
-#include "base/at_exit.h"
-#include "base/debug/crash_logging.h"
-#include "components/crash/core/common/crash_keys.h"
-#include "ios/chrome/app/app_delegate.h"
-#include "ios/chrome/app/startup/ios_chrome_main.h"
-#include "ios/chrome/browser/crash_report/breakpad_helper.h"
-#include "ios/chrome/browser/crash_report/crash_keys.h"
-#include "ios/chrome/common/channel_info.h"
-
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
-namespace {
-
-void StartCrashController() {
-  std::string channel_string = GetChannelString();
-
-  RegisterChromeIOSCrashKeys();
-  base::debug::SetCrashKeyValue(crash_keys::kChannel, channel_string);
-  breakpad_helper::Start(channel_string);
-}
-
-}  // namespace
-
-int main(int argc, char* argv[]) {
-  // Create the AtExitManager for the application before the crash controller
-  // is started. This needs to be stack allocated and live for the lifetime of
-  // the app.
-  base::AtExitManager at_exit;
-
-  IOSChromeMain::InitStartTime();
-
-  // Pre-launch actions are in their own autorelease pool so they get cleaned
-  // up before the main app starts.
-  @autoreleasepool {
-    NSUserDefaults* standardDefaults = [NSUserDefaults standardUserDefaults];
-
-    // Set NSUserDefaults keys to force pseudo-RTL if needed.
-    if ([standardDefaults boolForKey:@"EnablePseudoRTL"]) {
-      NSDictionary* pseudoDict = @{ @"YES" : @"AppleTextDirection" };
-      [standardDefaults registerDefaults:pseudoDict];
-    }
-
-    // The crash controller is started here, even though the user may have opted
-    // out; it needs to start as soon as possible to catch crashes during app
-    // launch. Since user preferences aren't loaded yet, it isn't known if the
-    // user has opted out. Once the preferences are loaded, the crash
-    // controller is stopped for opted-out users, and any crash reports that
-    // are collected before then are not sent.
-    StartCrashController();
-
-    // Always ignore SIGPIPE.  Chrome should always check the return value of
-    // write() instead of relying on this signal.
-    CHECK_NE(SIG_ERR, signal(SIGPIPE, SIG_IGN));
-  }
-
-  @autoreleasepool {
-    return UIApplicationMain(argc, argv, nil,
-                             NSStringFromClass([AppDelegate class]));
-  }
-}