Add LayoutTests for URL list of Response

third_party/WebKit/Source/modules/fetch/testing/InternalsFetch.cpp

Index: third_party/WebKit/Source/modules/fetch/testing/InternalsFetch.cpp
diff --git a/third_party/WebKit/Source/modules/fetch/testing/InternalsFetch.cpp b/third_party/WebKit/Source/modules/fetch/testing/InternalsFetch.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..ef71278f32c381cd73c2b6e05880e190321c5792
--- /dev/null
+++ b/third_party/WebKit/Source/modules/fetch/testing/InternalsFetch.cpp
@@ -0,0 +1,23 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "modules/fetch/testing/InternalsFetch.h"
+
+#include "modules/fetch/Response.h"
+#include "wtf/Vector.h"
+
+namespace blink {
+
+Vector<String> InternalsFetch::getInternalResponseURLList(Internals& internals,
+                                                          Response* response) {
+  if (!response)
+    return Vector<String>();
+  Vector<String> urlList;
+  urlList.reserveCapacity(response->internalURLList().size());
+  for (const auto& url : response->internalURLList())
+    urlList.append(url);
+  return urlList;
+}
+
+}  // namespace blink