Update ios/web/BUILD.gn to have latest web test_support.

ios/web/BUILD.gn

Index: ios/web/BUILD.gn
diff --git a/ios/web/BUILD.gn b/ios/web/BUILD.gn
index df15d6f35604e7a8c8e1134a8eb4e1cfd04abdbc..1665000ac532c679d184255cf75cd77ca9e30a76 100644
--- a/ios/web/BUILD.gn
+++ b/ios/web/BUILD.gn
@@ -284,8 +284,10 @@ source_set("test_support") {
 
   deps = [
     ":web",
+    "//base/test:test_support",
     "//ios/testing:ocmock_support",
     "//ios/third_party/gcdwebserver",
+    "//net:test_support",
     "//testing/gmock",
     "//testing/gtest",
     "//third_party/ocmock",
@@ -304,6 +306,10 @@ source_set("test_support") {
     "public/test/response_providers/file_based_response_provider.mm",
     "public/test/response_providers/file_based_response_provider_impl.h",
     "public/test/response_providers/file_based_response_provider_impl.mm",
+    "public/test/response_providers/html_response_provider.h",
+    "public/test/response_providers/html_response_provider.mm",
+    "public/test/response_providers/html_response_provider_impl.h",
+    "public/test/response_providers/html_response_provider_impl.mm",
     "public/test/response_providers/response_provider.h",
     "public/test/response_providers/response_provider.mm",
     "public/test/response_providers/string_response_provider.h",