[Clean Skeleton] Migrate code to clean/

ios/chrome/browser/ui/tab/tab_container_view_controller.mm

Index: ios/chrome/browser/ui/tab/tab_container_view_controller.mm
diff --git a/ios/chrome/browser/ui/tab/tab_container_view_controller.mm b/ios/chrome/browser/ui/tab/tab_container_view_controller.mm
deleted file mode 100644
index 3f7c173625c84cc005e7df7a4172d5ae06e8a66e..0000000000000000000000000000000000000000
--- a/ios/chrome/browser/ui/tab/tab_container_view_controller.mm
+++ /dev/null
@@ -1,284 +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/tab/tab_container_view_controller.h"
-
-#import "ios/chrome/browser/ui/ui_types.h"
-
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
-namespace {
-CGFloat kToolbarHeight = 56.0;
-}
-
-@interface TabContainerViewController ()
-
-// 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* contentConstraintsWithToolbar;
-@property(nonatomic, strong) Constraints* contentConstraintsWithoutToolbar;
-@property(nonatomic, strong) Constraints* toolbarConstraints;
-
-// Cache for forwarding methods to child view controllers.
-@property(nonatomic, assign) SEL actionToForward;
-@property(nonatomic, weak) UIResponder* forwardingTarget;
-
-// 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 toolbar view controller is set, but before
-// |-didMoveToParentViewController:| is called on that view controller.
-- (void)didAddToolbarViewController;
-
-// Methods to populate the constraint properties.
-- (void)updateContentConstraintsWithToolbar;
-- (void)updateContentConstraintsWithoutToolbar;
-- (void)updateToolbarConstraints;
-
-@end
-
-@implementation TabContainerViewController
-
-@synthesize contentViewController = _contentViewController;
-@synthesize toolbarViewController = _toolbarViewController;
-@synthesize topmostViewController = _topmostViewController;
-@synthesize contentConstraintsWithToolbar = _contentConstraintsWithToolbar;
-@synthesize contentConstraintsWithoutToolbar =
-    _contentConstraintsWithoutToolbar;
-@synthesize toolbarConstraints = _toolbarConstraints;
-@synthesize actionToForward = _actionToForward;
-@synthesize forwardingTarget = _forwardingTarget;
-
-#pragma mark - Public properties
-
-- (void)setContentViewController:(UIViewController*)contentViewController {
-  if (self.contentViewController == contentViewController)
-    return;
-
-  // Remove the current content view controller, if any.
-  [NSLayoutConstraint
-      deactivateConstraints:self.contentConstraintsWithoutToolbar];
-  [NSLayoutConstraint deactivateConstraints:self.contentConstraintsWithToolbar];
-  [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)setToolbarViewController:(UIViewController*)toolbarViewController {
-  if (self.toolbarViewController == toolbarViewController)
-    return;
-
-  // Remove the current toolbar view controller, if any.
-  [NSLayoutConstraint deactivateConstraints:self.toolbarConstraints];
-  [NSLayoutConstraint deactivateConstraints:self.contentConstraintsWithToolbar];
-  [self removeChildViewController:self.toolbarViewController];
-
-  // Add the new toolbar view controller.
-  [self addChildViewController:toolbarViewController];
-  toolbarViewController.view.translatesAutoresizingMaskIntoConstraints = NO;
-  [self.view addSubview:toolbarViewController.view];
-  _toolbarViewController = toolbarViewController;
-  [self didAddToolbarViewController];
-  [self.view setNeedsUpdateConstraints];
-  [self.toolbarViewController didMoveToParentViewController:self];
-}
-
-#pragma mark - UIViewController
-
-- (void)updateViewConstraints {
-  if (self.toolbarViewController) {
-    [NSLayoutConstraint activateConstraints:self.toolbarConstraints];
-    [NSLayoutConstraint activateConstraints:self.contentConstraintsWithToolbar];
-  } else {
-    [NSLayoutConstraint
-        activateConstraints:self.contentConstraintsWithoutToolbar];
-  }
-  [super updateViewConstraints];
-}
-
-- (UIViewController*)childViewControllerForStatusBarHidden {
-  return self.topmostViewController;
-}
-
-- (UIViewController*)childViewControllerForStatusBarStyle {
-  return self.topmostViewController;
-}
-
-#pragma mark - MenuPresentationDelegate
-
-- (CGRect)frameForMenuPresentation:(UIPresentationController*)presentation {
-  // Placeholder.
-  return CGRectMake(50, 50, 250, 300);
-}
-
-#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.toolbarViewController ]) {
-    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 - Private methods
-
-- (void)removeChildViewController:(UIViewController*)viewController {
-  if (viewController.parentViewController != self)
-    return;
-  [viewController willMoveToParentViewController:nil];
-  [viewController.view removeFromSuperview];
-  [viewController removeFromParentViewController];
-}
-
-- (void)didAddContentViewController {
-  if (self.toolbarViewController) {
-    [self updateContentConstraintsWithToolbar];
-  } else {
-    self.topmostViewController = self.contentViewController;
-    [self updateContentConstraintsWithoutToolbar];
-  }
-}
-
-- (void)didAddToolbarViewController {
-  [self updateToolbarConstraints];
-  // If there's already a content view controller, update the constraints for
-  // that, too.
-  if (self.contentViewController) {
-    [self updateContentConstraintsWithToolbar];
-  }
-}
-
-- (void)updateContentConstraintsWithToolbar {
-  // Template method for subclasses to implement;
-}
-
-- (void)updateToolbarConstraints {
-  // Template method for subclasses to implement;
-}
-
-- (void)updateContentConstraintsWithoutToolbar {
-  UIView* contentView = self.contentViewController.view;
-  self.contentConstraintsWithoutToolbar = @[
-    [contentView.topAnchor constraintEqualToAnchor:self.view.topAnchor],
-    [contentView.bottomAnchor constraintEqualToAnchor:self.view.bottomAnchor],
-    [contentView.leadingAnchor constraintEqualToAnchor:self.view.leadingAnchor],
-    [contentView.trailingAnchor
-        constraintEqualToAnchor:self.view.trailingAnchor],
-  ];
-}
-
-@end
-
-@implementation TopToolbarTabViewController
-
-- (void)didAddContentViewController {
-  [super didAddContentViewController];
-  if (!self.toolbarViewController) {
-    self.topmostViewController = self.contentViewController;
-  }
-}
-
-- (void)didAddToolbarViewController {
-  [super didAddToolbarViewController];
-  self.topmostViewController = self.toolbarViewController;
-}
-
-- (void)updateContentConstraintsWithToolbar {
-  UIView* contentView = self.contentViewController.view;
-  self.contentConstraintsWithToolbar = @[
-    [contentView.topAnchor
-        constraintEqualToAnchor:self.toolbarViewController.view.bottomAnchor],
-    [contentView.bottomAnchor constraintEqualToAnchor:self.view.bottomAnchor],
-    [contentView.leadingAnchor constraintEqualToAnchor:self.view.leadingAnchor],
-    [contentView.trailingAnchor
-        constraintEqualToAnchor:self.view.trailingAnchor],
-  ];
-}
-
-- (void)updateToolbarConstraints {
-  UIView* toolbarView = self.toolbarViewController.view;
-  self.toolbarConstraints = @[
-    [toolbarView.topAnchor constraintEqualToAnchor:self.view.topAnchor],
-    [toolbarView.heightAnchor constraintEqualToConstant:kToolbarHeight],
-    [toolbarView.leadingAnchor constraintEqualToAnchor:self.view.leadingAnchor],
-    [toolbarView.trailingAnchor
-        constraintEqualToAnchor:self.view.trailingAnchor],
-  ];
-}
-
-@end
-
-@implementation BottomToolbarTabViewController
-
-- (void)didAddContentViewController {
-  [super didAddContentViewController];
-  self.topmostViewController = self.contentViewController;
-}
-
-// Note that this class doesn't override -didAddToolbarViewController; in the
-// case where there is a toolbar view controller set but not a content view
-// controller, functionally there is no topmost view controller, so no
-// additional action needs to be taken.
-
-- (void)updateContentConstraintsWithToolbar {
-  UIView* contentView = self.contentViewController.view;
-  self.contentConstraintsWithToolbar = @[
-    [contentView.topAnchor constraintEqualToAnchor:self.view.topAnchor],
-    [contentView.bottomAnchor
-        constraintEqualToAnchor:self.toolbarViewController.view.topAnchor],
-    [contentView.leadingAnchor constraintEqualToAnchor:self.view.leadingAnchor],
-    [contentView.trailingAnchor
-        constraintEqualToAnchor:self.view.trailingAnchor],
-  ];
-}
-
-- (void)updateToolbarConstraints {
-  UIView* toolbarView = self.toolbarViewController.view;
-  self.toolbarConstraints = @[
-    [toolbarView.bottomAnchor constraintEqualToAnchor:self.view.bottomAnchor],
-    [toolbarView.heightAnchor constraintEqualToConstant:kToolbarHeight],
-    [toolbarView.leadingAnchor constraintEqualToAnchor:self.view.leadingAnchor],
-    [toolbarView.trailingAnchor
-        constraintEqualToAnchor:self.view.trailingAnchor],
-  ];
-}
-
-@end