Upstream ios/web/navigation

ios/web/public/navigation_item.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_PUBLIC_NAVIGATION_ITEM_H_
 #define IOS_WEB_PUBLIC_NAVIGATION_ITEM_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string16.h"
 #include "base/time/time.h"
+#include "ios/web/public/web_state/page_scroll_state.h"
 #include "ui/base/page_transition_types.h"
 
 class GURL;
 
 namespace web {
 struct FaviconStatus;
 struct Referrer;
 struct SSLStatus;
 
 // A NavigationItem is a data structure that captures all the information
@@ skipping 40 matching lines @@
   // the user.
   virtual void SetTitle(const base::string16& title) = 0;
   virtual const base::string16& GetTitle() const = 0;
 
   // Describes the current page that the tab represents. This is the ID that the
   // renderer generated for the page and is how we can tell new versus
   // renavigations.
   virtual void SetPageID(int page_id) = 0;
   virtual int32 GetPageID() const = 0;
 
+  // Stores the NavigationItem's last recorded scroll offset and zoom scale.
+  virtual void SetPageScrollState(const PageScrollState& scroll_state) = 0;
+  virtual const PageScrollState& GetPageScrollState() const = 0;
+
   // Page-related helpers ------------------------------------------------------
 
   // Returns the title to be displayed on the tab. This could be the title of
   // the page if it is available or the URL. |languages| is the list of
   // accpeted languages (e.g., prefs::kAcceptLanguages) or empty if proper
   // URL formatting isn't needed (e.g., unit tests).
   virtual const base::string16& GetTitleForDisplay(
       const std::string& languages) const = 0;
 
   // Tracking stuff ------------------------------------------------------------
@@ skipping 16 matching lines @@
   // page is reloaded.)
   //
   // If GetTimestamp() returns a null time, that means that either:
   //
   //   - this navigation hasn't completed yet;
   //   - this navigation was restored and for some reason the
   //     timestamp wasn't available;
   //   - or this navigation was copied from a foreign session.
   virtual void SetTimestamp(base::Time timestamp) = 0;
   virtual base::Time GetTimestamp() const = 0;
+
+  // |true| if this item contains unsafe resources and will be removed. This
+  // property doesn't get serialized.
+  virtual void SetUnsafe(bool is_unsafe) = 0;
+  virtual bool IsUnsafe() const = 0;
 };
 
 }  // namespace web
 
 #endif  // IOS_WEB_PUBLIC_NAVIGATION_ITEM_H_