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

ios/web/public/test/response_providers/html_response_provider.h

Index: ios/web/public/test/response_providers/html_response_provider.h
diff --git a/ios/web/public/test/response_providers/html_response_provider.h b/ios/web/public/test/response_providers/html_response_provider.h
index 933b32be73f7c1102fa79703598e853432613880..d19d972df20c91431a1f6cc5a0b7900d44e661ac 100644
--- a/ios/web/public/test/response_providers/html_response_provider.h
+++ b/ios/web/public/test/response_providers/html_response_provider.h
@@ -27,9 +27,10 @@ class HtmlResponseProvider : public web::DataResponseProvider {
   // to a URL based on the mapping present in |responses|.
   explicit HtmlResponseProvider(const std::map<GURL, std::string>& responses);
   // Constructs an HtmlResponseProvider that generates a simple string response
-  // to a URL based on the mapping present in |responses| and |cookie|.
-  explicit HtmlResponseProvider(const std::map<GURL, std::string>& responses,
-                                const std::string& cookie);
+  // to a URL with a Set-Cookie entry in the headers based on the mapping
+  // present in |responses|.
+  explicit HtmlResponseProvider(
+      const std::map<GURL, std::pair<std::string, std::string>>& responses);
   // Constructs an HtmlResponseProvider that generates a response to a URL based
   // on the mapping present in |responses|.
   explicit HtmlResponseProvider(