[iOS] Upstream //ios/net

ios/net/nsurlrequest_util.mm

+// Copyright 2014 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 "ios/net/nsurlrequest_util.h"
+
+#include "base/strings/stringprintf.h"
+
+namespace net {
+
+std::string FormatUrlRequestForLogging(NSURLRequest* request) {
+  NSString* urlAbsoluteString = request.URL.absoluteString;
+  NSString* mainDocumentURLAbsoluteString =
+      request.mainDocumentURL.absoluteString;
+  return base::StringPrintf(
+      "request: %s request.mainDocURL: %s",
+      urlAbsoluteString ? urlAbsoluteString.UTF8String : "[nil]",
+      mainDocumentURLAbsoluteString ?
+          mainDocumentURLAbsoluteString.UTF8String : "[nil]");
+}
+
+}  // namespace net