[Clean Skeleton] Migrate code to clean/

ios/showcase/tab_grid/BUILD.gn

 # 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.
 
 source_set("tab_grid") {
   sources = [
     "sc_tab_grid_coordinator.h",
     "sc_tab_grid_coordinator.mm",
   ]
   deps = [
     "//base",
-    "//ios/chrome/browser/ui/commands:commands_clean_skeleton",
-    "//ios/chrome/browser/ui/tab_grid:tab_grid_ui",
+    "//ios/clean/chrome/browser/ui/commands",
+    "//ios/clean/chrome/browser/ui/tab_grid:tab_grid_ui",
     "//ios/showcase/common",
   ]
   libs = [ "UIKit.framework" ]
   configs += [ "//build/config/compiler:enable_arc" ]
 }
 
 source_set("eg_tests") {
   testonly = true
   sources = [
     "sc_tab_grid_egtest.mm",
   ]
   deps = [
     "//ios/showcase/test",
     "//ios/third_party/earl_grey",
   ]
   configs += [ "//build/config/compiler:enable_arc" ]
 }