[Clean Skeleton] Migrate code to clean/

ios/chrome/browser/ui/strip/strip_container_view_controller.mm

Index: ios/chrome/browser/ui/strip/strip_container_view_controller.mm
diff --git a/ios/chrome/browser/ui/strip/strip_container_view_controller.mm b/ios/chrome/browser/ui/strip/strip_container_view_controller.mm
deleted file mode 100644
index 2a0817fb97c440288afcb3e434c485110394391f..0000000000000000000000000000000000000000
--- a/ios/chrome/browser/ui/strip/strip_container_view_controller.mm
+++ /dev/null
@@ -1,229 +0,0 @@
-// 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/browser/ui/strip/strip_container_view_controller.h"
-
-#import "ios/chrome/browser/ui/ui_types.h"
-#import "ios/chrome/browser/ui/actions/tab_strip_actions.h"
-
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
-namespace {
-CGFloat kStripHeight = 200.0;
-}
-
-@interface StripContainerViewController ()<TabStripActions>
-
-// Whichever view controller is at the top of the screen. This view controller
-// controls the status bar.
-@property(nonatomic, weak) UIViewController* topmostViewController;
-
-@property(nonatomic, strong) Constraints* contentConstraintsWithStrip;
-@property(nonatomic, strong) Constraints* contentConstraintsWithoutStrip;
-@property(nonatomic, strong) Constraints* stripConstraints;
-
-// Cache for forwarding methods to child view controllers.
-@property(nonatomic, assign) SEL actionToForward;
-@property(nonatomic, weak) UIResponder* forwardingTarget;
-
-@property(nonatomic, strong) NSLayoutConstraint* stripHeightConstraint;
-
-// Contained view controller utility methods.
-- (void)removeChildViewController:(UIViewController*)viewController;
-
-// Called after a new content view controller is set, but before
-// |-didMoveToParentViewController:| is called on that view controller.
-- (void)didAddContentViewController;
-
-// Called after a new strip view controller is set, but before
-// |-didMoveToParentViewController:| is called on that view controller.
-- (void)didAddStripViewController;
-
-// Methods to populate the constraint properties.
-- (void)updateContentConstraintsWithStrip;
-- (void)updateContentConstraintsWithoutStrip;
-- (void)updateStripConstraints;
-
-@end
-
-@implementation StripContainerViewController
-
-@synthesize contentViewController = _contentViewController;
-@synthesize stripViewController = _stripViewController;
-@synthesize topmostViewController = _topmostViewController;
-@synthesize contentConstraintsWithStrip = _contentConstraintsWithStrip;
-@synthesize contentConstraintsWithoutStrip = _contentConstraintsWithoutStrip;
-@synthesize stripConstraints = _stripConstraints;
-@synthesize actionToForward = _actionToForward;
-@synthesize forwardingTarget = _forwardingTarget;
-@synthesize stripHeightConstraint = _stripHeightConstraint;
-
-#pragma mark - Public properties
-
-- (void)setContentViewController:(UIViewController*)contentViewController {
-  if (self.contentViewController == contentViewController)
-    return;
-
-  // Remove the current content view controller, if any.
-  [NSLayoutConstraint
-      deactivateConstraints:self.contentConstraintsWithoutStrip];
-  [NSLayoutConstraint deactivateConstraints:self.contentConstraintsWithStrip];
-  [self removeChildViewController:self.contentViewController];
-
-  // Add the new content view controller.
-  [self addChildViewController:contentViewController];
-  contentViewController.view.translatesAutoresizingMaskIntoConstraints = NO;
-  [self.view addSubview:contentViewController.view];
-  _contentViewController = contentViewController;
-  [self didAddContentViewController];
-  [self.view setNeedsUpdateConstraints];
-  [self.contentViewController didMoveToParentViewController:self];
-}
-
-- (void)setStripViewController:(UIViewController*)stripViewController {
-  if (self.stripViewController == stripViewController)
-    return;
-
-  // Remove the current strip view controller, if any.
-  [NSLayoutConstraint deactivateConstraints:self.stripConstraints];
-  [NSLayoutConstraint deactivateConstraints:self.contentConstraintsWithStrip];
-  [self removeChildViewController:self.stripViewController];
-
-  // Add the new strip view controller.
-  [self addChildViewController:stripViewController];
-  stripViewController.view.translatesAutoresizingMaskIntoConstraints = NO;
-  [self.view addSubview:stripViewController.view];
-  _stripViewController = stripViewController;
-  [self didAddStripViewController];
-  [self.view setNeedsUpdateConstraints];
-  [self.stripViewController didMoveToParentViewController:self];
-}
-
-#pragma mark - UIViewController
-
-- (void)updateViewConstraints {
-  if (self.stripViewController) {
-    [NSLayoutConstraint activateConstraints:self.stripConstraints];
-    [NSLayoutConstraint activateConstraints:self.contentConstraintsWithStrip];
-  } else {
-    [NSLayoutConstraint
-        activateConstraints:self.contentConstraintsWithoutStrip];
-  }
-  [super updateViewConstraints];
-}
-
-- (UIViewController*)childViewControllerForStatusBarHidden {
-  return self.topmostViewController;
-}
-
-- (UIViewController*)childViewControllerForStatusBarStyle {
-  return self.topmostViewController;
-}
-
-#pragma mark - UIResponder
-
-// Before forwarding actions up the responder chain, give both contained
-// view controllers a chance to handle them.
-- (BOOL)canPerformAction:(SEL)action withSender:(id)sender {
-  self.actionToForward = nullptr;
-  self.forwardingTarget = nil;
-  for (UIResponder* responder in
-       @[ self.contentViewController, self.stripViewController ]) {
-    if ([responder canPerformAction:action withSender:sender]) {
-      self.actionToForward = action;
-      self.forwardingTarget = responder;
-      return YES;
-    }
-  }
-  return [super canPerformAction:action withSender:sender];
-}
-
-#pragma mark - NSObject method forwarding
-
-- (id)forwardingTargetForSelector:(SEL)aSelector {
-  if (aSelector == self.actionToForward) {
-    return self.forwardingTarget;
-  }
-  return nil;
-}
-
-#pragma mark - TabStripActions
-
-// Action to toggle visibility of tab strip.
-- (void)toggleTabStrip:(id)sender {
-  self.stripHeightConstraint.constant =
-      self.stripHeightConstraint.constant > 0 ? 0.0 : kStripHeight;
-}
-
-#pragma mark - Private methods
-
-- (void)removeChildViewController:(UIViewController*)viewController {
-  if (viewController.parentViewController != self)
-    return;
-  [viewController willMoveToParentViewController:nil];
-  [viewController.view removeFromSuperview];
-  [viewController removeFromParentViewController];
-}
-
-- (void)didAddContentViewController {
-  if (self.stripViewController) {
-    [self updateContentConstraintsWithStrip];
-  } else {
-    self.topmostViewController = self.contentViewController;
-    [self updateContentConstraintsWithoutStrip];
-  }
-}
-
-- (void)didAddStripViewController {
-  [self updateStripConstraints];
-  // If there's already a content view controller, update the constraints for
-  // that, too.
-  if (self.contentViewController) {
-    [self updateContentConstraintsWithStrip];
-  }
-  self.topmostViewController = self.stripViewController;
-}
-
-- (void)updateContentConstraintsWithoutStrip {
-  UIView* contentView = self.contentViewController.view;
-  self.contentConstraintsWithoutStrip = @[
-    [contentView.topAnchor constraintEqualToAnchor:self.view.topAnchor],
-    [contentView.bottomAnchor constraintEqualToAnchor:self.view.bottomAnchor],
-    [contentView.leadingAnchor constraintEqualToAnchor:self.view.leadingAnchor],
-    [contentView.trailingAnchor
-        constraintEqualToAnchor:self.view.trailingAnchor],
-  ];
-}
-
-- (void)updateContentConstraintsWithStrip {
-  UIView* contentView = self.contentViewController.view;
-  self.contentConstraintsWithStrip = @[
-    [contentView.topAnchor
-        constraintEqualToAnchor:self.stripViewController.view.bottomAnchor],
-    [contentView.bottomAnchor constraintEqualToAnchor:self.view.bottomAnchor],
-    [contentView.leadingAnchor constraintEqualToAnchor:self.view.leadingAnchor],
-    [contentView.trailingAnchor
-        constraintEqualToAnchor:self.view.trailingAnchor],
-  ];
-}
-
-- (void)updateStripConstraints {
-  UIView* stripView = self.stripViewController.view;
-  self.stripHeightConstraint =
-      [stripView.heightAnchor constraintEqualToConstant:0.0];
-  self.stripConstraints = @[
-    [stripView.topAnchor constraintEqualToAnchor:self.view.topAnchor],
-    [stripView.leadingAnchor constraintEqualToAnchor:self.view.leadingAnchor],
-    [stripView.trailingAnchor constraintEqualToAnchor:self.view.trailingAnchor],
-    self.stripHeightConstraint,
-  ];
-}
-
-@end