[ios] Made TestWebStateDelegate and TestJavaScriptDialogPresenter reusable.

ios/web/BUILD.gn

Index: ios/web/BUILD.gn
diff --git a/ios/web/BUILD.gn b/ios/web/BUILD.gn
index 4d42c2b6692b02b9b50eacab95a83c2ff4de6f25..af38061b413076e164f1497d6208dd5a09f02ecd 100644
--- a/ios/web/BUILD.gn
+++ b/ios/web/BUILD.gn
@@ -383,6 +383,8 @@ source_set("test_support") {
     "public/test/fakes/crw_test_js_injection_receiver.mm",
     "public/test/fakes/test_browser_state.cc",
     "public/test/fakes/test_browser_state.h",
+    "public/test/fakes/test_java_script_dialog_presenter.h",
+    "public/test/fakes/test_java_script_dialog_presenter.mm",
     "public/test/fakes/test_native_content.h",
     "public/test/fakes/test_native_content.mm",
     "public/test/fakes/test_native_content_provider.h",
@@ -393,6 +395,8 @@ source_set("test_support") {
     "public/test/fakes/test_web_client.mm",
     "public/test/fakes/test_web_state.h",
     "public/test/fakes/test_web_state.mm",
+    "public/test/fakes/test_web_state_delegate.h",
+    "public/test/fakes/test_web_state_delegate.mm",
     "public/test/fakes/test_web_view_content_view.h",
     "public/test/fakes/test_web_view_content_view.mm",
     "public/test/http_server.h",