[Clean Skeleton] Migrate code to clean/

ios/clean/chrome/browser/ui/tab_grid/tab_grid_tab_cell.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/browser/ui/tab_grid/tab_grid_tab_cell.h"
+#import "ios/clean/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;
 }
 
@@ skipping 23 matching lines @@
                                       .leadingAnchor],
       [_label.trailingAnchor
           constraintEqualToAnchor:self.contentView.layoutMarginsGuide
                                       .trailingAnchor],
     ]];
   }
   return self;
 }
 
 @end