[Clean Skeleton] Migrate code to clean/

ios/chrome/app/application_state.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 "ios/chrome/app/application_state.h"
-
-#include <memory>
-
-#include "base/logging.h"
-#include "base/memory/ptr_util.h"
-#include "base/supports_user_data.h"
-#import "ios/chrome/app/application_step.h"
-
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
-namespace {
-
-// Specialization of base::SupportsUserData for use in this class.
-class PersistentApplicationState : public base::SupportsUserData {
- public:
-  ~PersistentApplicationState() override {}
-};
-
-}  // namespace
-
-@interface ApplicationState ()
-@property(nonatomic, readwrite, copy) NSDictionary* launchOptions;
-@end
-
-@implementation ApplicationState {
-  std::unique_ptr<PersistentApplicationState> _persistentState;
-}
-
-@synthesize application = _application;
-@synthesize browserState = _browserState;
-@synthesize URLOpener = _URLOpener;
-@synthesize phase = _phase;
-@synthesize window = _window;
-@synthesize launchSteps = _launchSteps;
-@synthesize terminationSteps = _terminationSteps;
-@synthesize backgroundSteps = _backgroundSteps;
-@synthesize foregroundSteps = _foregroundSteps;
-@synthesize launchOptions = _launchOptions;
-
-#pragma mark - Object lifecycle
-
-- (instancetype)init {
-  if ((self = [super init])) {
-    _phase = APPLICATION_COLD;
-    _launchSteps = [ApplicationStepArray array];
-    _terminationSteps = [ApplicationStepArray array];
-    _backgroundSteps = [ApplicationStepArray array];
-    _foregroundSteps = [ApplicationStepArray array];
-    _persistentState = base::MakeUnique<PersistentApplicationState>();
-  }
-  return self;
-}
-
-#pragma mark - Public API
-
-- (base::SupportsUserData*)persistentState {
-  return _persistentState.get();
-}
-
-- (void)launchWithOptions:(NSDictionary*)launchOptions {
-  self.launchOptions = launchOptions;
-  [self continueLaunch];
-}
-
-- (void)continueLaunch {
-  [self runSteps:self.launchSteps];
-}
-
-- (void)terminate {
-  CHECK(self.phase != APPLICATION_TERMINATING);
-  self.phase = APPLICATION_TERMINATING;
-  [self runSteps:self.terminationSteps];
-  CHECK(self.terminationSteps.count == 0);
-}
-
-- (void)background {
-  [self runSteps:self.backgroundSteps];
-}
-
-- (void)foreground {
-  [self runSteps:self.foregroundSteps];
-}
-
-#pragma mark - Running steps
-
-// While the first step in |steps| can run in |self|, pop it, run it, and
-// release ownership of it.
-- (void)runSteps:(ApplicationStepArray*)steps {
-  while ([steps.firstObject canRunInState:self]) {
-    id<ApplicationStep> nextStep = steps.firstObject;
-    [steps removeObject:nextStep];
-    // |nextStep| should not be in |steps| when -runInState is called.
-    // (Some steps may re-insert themselves into |steps|, for example).
-    DCHECK(![steps containsObject:nextStep]);
-    [nextStep runInState:self];
-  }
-}
-
-@end