Upstream most of ios/web/net

ios/web/ui_web_view_util.h

+// 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.
+
+#ifndef IOS_WEB_UI_WEB_VIEW_UTIL_H_
+#define IOS_WEB_UI_WEB_VIEW_UTIL_H_
+
+#include <Foundation/Foundation.h>
+
+namespace web {
+
+// Registers the user agent encoding |request_group_id| in the user defaults.
+// This is a utility method, used to workaround crbug.com/228397. Do not use
+// it for other purposes.
+void BuildAndRegisterUserAgentForUIWebView(NSString* request_group_id,
+                                           BOOL use_desktop_user_agent);
+
+// Registers |user_agent| as the user agent string to be used by the UIWebView
+// instances that are created from now on.
+void RegisterUserAgentForUIWebView(NSString* user_agent);
+
+}  // namespace web
+
+#endif  // IOS_WEB_UI_WEB_VIEW_UTIL_H_