change navigation initiation type default value to RENDERER_INITIATED

ios/web/navigation/navigation_manager_impl.h

 // Copyright 2013 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_NAVIGATION_NAVIGATION_MANAGER_IMPL_H_
 #define IOS_WEB_NAVIGATION_NAVIGATION_MANAGER_IMPL_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 10 matching lines @@
 namespace web {
 class BrowserState;
 class NavigationItem;
 struct Referrer;
 class NavigationManagerDelegate;
 class NavigationManagerFacadeDelegate;
 class SessionStorageBuilder;
 
 // Defines the ways how a pending navigation can be initiated.
 enum class NavigationInitiationType {
+  NONE = 1,

[Eugene But (OOO till 7-30), 2017/02/21 23:00:40]

This can be 0, because it's a good default value.

[Eugene But (OOO till 7-30), 2017/02/21 23:00:40]

Needs comments

[liaoyuke, 2017/02/21 23:07:47]

Done.

[liaoyuke, 2017/02/21 23:07:47]

Done.

+
   // Navigation was initiated by actual user action.
-  USER_INITIATED = 1,
+  USER_INITIATED,
 
   // Navigation was initiated by renderer. Examples of renderer-initiated
   // navigations include:
   //  * <a> link click
   //  * changing window.location.href
   //  * redirect via the <meta http-equiv="refresh"> tag
   //  * using window.history.pushState
   RENDERER_INITIATED,
 };
 
@@ skipping 154 matching lines @@
   // List of transient url rewriters added by |AddTransientURLRewriter()|.
   std::unique_ptr<std::vector<BrowserURLRewriter::URLRewriter>>
       transient_url_rewriters_;
 
   DISALLOW_COPY_AND_ASSIGN(NavigationManagerImpl);
 };
 
 }  // namespace web
 
 #endif  // IOS_WEB_NAVIGATION_NAVIGATION_MANAGER_IMPL_H_