Clean the new CRWContextMenuController

ios/web/web_state/context_menu_params_utils.h

+// Copyright 2017 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_WEB_STATE_CONTEXT_MENU_PARAMS_UTILS_H_
+#define IOS_WEB_WEB_STATE_CONTEXT_MENU_PARAMS_UTILS_H_
+
+#import <UIKit/UIKit.h>
+
+#import "ios/web/public/web_state/context_menu_params.h"
+
+namespace web {
+// creates a ContextMenuParams from a NSDictionary representing an HTML element.
+// The fields "href", "src", "title", "referrerPolicy" and "innerText" will
+// be used (if present) to generate the ContextMenuParams.
+// All these fields must be NSString*.
+// This constructor does not set fields relative to the touch event (view and
+// location).
+ContextMenuParams ContextMenuParamsFromElementDictionary(NSDictionary* element);
+}  // namespace web
+
+#endif  // IOS_WEB_WEB_STATE_CONTEXT_MENU_PARAMS_UTILS_H_