Revert of [ios] Move WebStateList to ios/chrome/browser/web_state_list.

ios/chrome/browser/ui/toolbar/BUILD.gn

Index: ios/chrome/browser/ui/toolbar/BUILD.gn
diff --git a/ios/chrome/browser/ui/toolbar/BUILD.gn b/ios/chrome/browser/ui/toolbar/BUILD.gn
index 68d815db6644d27de830fc0d9e8be19bde3fac94..fa3e27e2e4eb6b9403fd9e4f677bc6b306927078 100644
--- a/ios/chrome/browser/ui/toolbar/BUILD.gn
+++ b/ios/chrome/browser/ui/toolbar/BUILD.gn
@@ -94,11 +94,11 @@
     "//ios/chrome/browser/ui/tools_menu",
     "//ios/chrome/browser/ui/util",
     "//ios/chrome/browser/ui/voice",
-    "//ios/chrome/browser/web_state_list",
     "//ios/chrome/common",
     "//ios/public/provider/chrome/browser",
     "//ios/public/provider/chrome/browser/images",
     "//ios/public/provider/chrome/browser/voice",
+    "//ios/shared/chrome/browser/tabs",
     "//ios/shared/chrome/browser/ui/omnibox",
     "//ios/third_party/material_components_ios",
     "//ios/third_party/material_roboto_font_loader_ios",
@@ -168,9 +168,9 @@
     "//ios/chrome/browser/browser_state:test_support",
     "//ios/chrome/browser/tabs",
     "//ios/chrome/browser/ui",
-    "//ios/chrome/browser/web_state_list",
-    "//ios/chrome/browser/web_state_list:test_support",
     "//ios/chrome/test:test_support",
+    "//ios/shared/chrome/browser/tabs",
+    "//ios/shared/chrome/browser/tabs:test_support",
     "//ios/testing:ocmock_support",
     "//ios/web:test_support",
     "//testing/gtest",