Add capability to simple http server to bound Set-Cookie to URLs.

ios/web/public/test/response_providers/html_response_provider_impl.mm

Index: ios/web/public/test/response_providers/html_response_provider_impl.mm
diff --git a/ios/web/public/test/response_providers/html_response_provider_impl.mm b/ios/web/public/test/response_providers/html_response_provider_impl.mm
index 97f000df161467ee863cfb721c3d0272482c77ae..0ae64fec99b410f7b020c22a95ddc8d9d5a85579 100644
--- a/ios/web/public/test/response_providers/html_response_provider_impl.mm
+++ b/ios/web/public/test/response_providers/html_response_provider_impl.mm
@@ -20,6 +20,19 @@
   }
   return responses;
 }
+
+std::map<GURL, HtmlResponseProviderImpl::Response> BuildResponseMap(
+    const std::map<GURL, std::pair<std::string, std::string>>& responses,
+    const std::map<GURL, scoped_refptr<net::HttpResponseHeaders>>& headers) {
+  std::map<GURL, HtmlResponseProviderImpl::Response> response_map;
+  for (const auto& pair : responses) {
+    response_map.insert(std::make_pair(
+        pair.first, HtmlResponseProviderImpl::Response(
+                        pair.second.second, headers.at(pair.first))));
+  }
+  return response_map;
+}
+
 }  // namespace
 
 HtmlResponseProviderImpl::Response::Response(
@@ -61,11 +74,10 @@
           web::ResponseProvider::GetDefaultResponseHeaders())) {}
 
 HtmlResponseProviderImpl::HtmlResponseProviderImpl(
-    const std::map<GURL, std::string>& responses,
-    const std::string& cookie)
+    const std::map<GURL, std::pair<std::string, std::string>>& responses)
     : responses_(BuildResponseMap(
           responses,
-          web::ResponseProvider::GetDefaultResponseHeaders(cookie))) {}
+          web::ResponseProvider::GetDefaultResponseHeaders(responses))) {}
 
 HtmlResponseProviderImpl::HtmlResponseProviderImpl(
     const std::map<GURL, HtmlResponseProviderImpl::Response>& responses)