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

ios/chrome/browser/ui/BUILD.gn

Index: ios/chrome/browser/ui/BUILD.gn
diff --git a/ios/chrome/browser/ui/BUILD.gn b/ios/chrome/browser/ui/BUILD.gn
index c19100266ae4cfcd3a98570936eac6a83b9cfd27..a703eee0380d5e4cc973c3d03d3898ccf6b4b6f1 100644
--- a/ios/chrome/browser/ui/BUILD.gn
+++ b/ios/chrome/browser/ui/BUILD.gn
@@ -106,9 +106,9 @@ source_set("unit_tests") {
     "//ios/chrome/browser/ui/toolbar",
     "//ios/chrome/browser/ui/toolbar:test_support",
     "//ios/chrome/browser/web:web_internal",
+    "//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",
     "//ios/web:test_support",
@@ -306,12 +306,12 @@ source_set("ui_internal") {
     "//ios/chrome/browser/upgrade",
     "//ios/chrome/browser/web",
     "//ios/chrome/browser/web:web_internal",
+    "//ios/chrome/browser/web_state_list",
     "//ios/chrome/common",
     "//ios/net",
     "//ios/public/provider/chrome/browser",
     "//ios/public/provider/chrome/browser/ui",
     "//ios/public/provider/chrome/browser/voice",
-    "//ios/shared/chrome/browser/tabs",
     "//ios/third_party/material_components_ios",
     "//ios/web",
     "//ios/web:user_agent",
@@ -427,9 +427,9 @@ source_set("perf_tests") {
     "//ios/chrome/browser/tabs:tabs_internal",
     "//ios/chrome/browser/ui/omnibox:omnibox_internal",
     "//ios/chrome/browser/ui/toolbar",
+    "//ios/chrome/browser/web_state_list",
+    "//ios/chrome/browser/web_state_list:test_support",
     "//ios/chrome/test/base:perf_test_support",
-    "//ios/shared/chrome/browser/tabs",
-    "//ios/shared/chrome/browser/tabs:test_support",
     "//ios/web:test_support",
     "//testing/gtest",
     "//third_party/ocmock",