Split up ios/web:test_support.

ios/web/public/test/http_server/string_response_provider.h

Index: ios/web/public/test/http_server/string_response_provider.h
diff --git a/ios/web/public/test/response_providers/string_response_provider.h b/ios/web/public/test/http_server/string_response_provider.h
similarity index 74%
rename from ios/web/public/test/response_providers/string_response_provider.h
rename to ios/web/public/test/http_server/string_response_provider.h
index 2b20d7dc7a897ee858a5e4f1ae0627fc198cc687..2e53b68d69a6effee5c2a52fbeb145aa24a0b173 100644
--- a/ios/web/public/test/response_providers/string_response_provider.h
+++ b/ios/web/public/test/http_server/string_response_provider.h
@@ -2,13 +2,13 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef IOS_WEB_PUBLIC_TEST_RESPONSE_PROVIDERS_STRING_RESPONSE_PROVIDER_H_
-#define IOS_WEB_PUBLIC_TEST_RESPONSE_PROVIDERS_STRING_RESPONSE_PROVIDER_H_
+#ifndef IOS_WEB_PUBLIC_TEST_HTTP_SERVER_STRING_RESPONSE_PROVIDER_H_
+#define IOS_WEB_PUBLIC_TEST_HTTP_SERVER_STRING_RESPONSE_PROVIDER_H_
 
 #include <string>
 
 #include "base/macros.h"
-#import "ios/web/public/test/response_providers/data_response_provider.h"
+#import "ios/web/public/test/http_server/data_response_provider.h"
 
 namespace web {
 
@@ -33,4 +33,4 @@ class StringResponseProvider : public web::DataResponseProvider {
 
 }  // namespace web
 
-#endif  // IOS_WEB_PUBLIC_TEST_RESPONSE_PROVIDERS_STRING_RESPONSE_PROVIDER_H_
+#endif  // IOS_WEB_PUBLIC_TEST_HTTP_SERVER_STRING_RESPONSE_PROVIDER_H_