Upstream ios/web/navigation

ios/web/navigation/navigation_item_facade_delegate.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_NAVIGATION_NAVIGATION_ITEM_FACADE_DELEGATE_H_
+#define IOS_WEB_NAVIGATION_NAVIGATION_ITEM_FACADE_DELEGATE_H_
+
+namespace content {
+class NavigationEntry;
+}
+
+namespace web {
+
+class NavigationItemImpl;
+
+// Interface used by NavigationItems to interact with their NavigationEntry
+// facades.  This pushes references to NavigationEntry out of the web-layer.
+// Note that since communication is one-directional, this interface is primarily
+// to add hooks for creation/deletion of facades.
+class NavigationItemFacadeDelegate {
+ public:
+  NavigationItemFacadeDelegate() {}
+  virtual ~NavigationItemFacadeDelegate() {}
+
+  // Returns the facade object being driven by this delegate.
+  virtual content::NavigationEntry* GetNavigationEntryFacade() = 0;
+};
+
+}  // namespace web
+
+#endif  // IOS_WEB_NAVIGATION_NAVIGATION_ITEM_FACADE_DELEGATE_H_