[Clean Skeleton] Migrate code to clean/

ios/chrome/browser/ui/tab_grid/tab_grid_tab_cell.mm

Index: ios/chrome/browser/ui/tab_grid/tab_grid_tab_cell.mm
diff --git a/ios/chrome/browser/ui/tab_grid/tab_grid_tab_cell.mm b/ios/chrome/browser/ui/tab_grid/tab_grid_tab_cell.mm
deleted file mode 100644
index 8f6a34f48835bea98d6e6fb5499755862500be91..0000000000000000000000000000000000000000
--- a/ios/chrome/browser/ui/tab_grid/tab_grid_tab_cell.mm
+++ /dev/null
@@ -1,52 +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_grid/tab_grid_tab_cell.h"
-
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
-namespace {
-const CGFloat kCornerRadius = 4.0;
-const CGFloat kSelectedBorderWidth = 2.0;
-}
-
-@implementation TabGridTabCell
-
-@synthesize label = _label;
-
-- (instancetype)initWithFrame:(CGRect)frame {
-  if ((self = [super initWithFrame:frame])) {
-    self.contentView.layer.cornerRadius = kCornerRadius;
-    self.selectedBackgroundView.layer.cornerRadius = kCornerRadius;
-    self.selectedBackgroundView.layer.borderWidth = kSelectedBorderWidth;
-    self.selectedBackgroundView.layer.borderColor = [UIColor blueColor].CGColor;
-    self.selectedBackgroundView.transform = CGAffineTransformScale(
-        self.selectedBackgroundView.transform, 1.05, 1.05);
-
-    _label = [[UILabel alloc] initWithFrame:CGRectZero];
-    _label.translatesAutoresizingMaskIntoConstraints = NO;
-    _label.numberOfLines = 1;
-    _label.textAlignment = NSTextAlignmentCenter;
-    [self.contentView addSubview:_label];
-    [NSLayoutConstraint activateConstraints:@[
-      [_label.centerYAnchor
-          constraintEqualToAnchor:self.contentView.centerYAnchor],
-      [_label.leadingAnchor
-          constraintEqualToAnchor:self.contentView.layoutMarginsGuide
-                                      .leadingAnchor],
-      [_label.trailingAnchor
-          constraintEqualToAnchor:self.contentView.layoutMarginsGuide
-                                      .trailingAnchor],
-    ]];
-  }
-  return self;
-}
-
-@end