Adds web::NavigationItemImpl.

ios/web/navigation/navigation_item_impl.h

Index: ios/web/navigation/navigation_item_impl.h
diff --git a/ios/web/navigation/navigation_item_impl.h b/ios/web/navigation/navigation_item_impl.h
new file mode 100644
index 0000000000000000000000000000000000000000..1e4707f01efb8121c804a4dd6a76a578229dd867
--- /dev/null
+++ b/ios/web/navigation/navigation_item_impl.h
@@ -0,0 +1,70 @@
+// 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_IMPL_H_
+#define IOS_WEB_NAVIGATION_NAVIGATION_ITEM_IMPL_H_
+
+#include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/strings/string16.h"
+#include "ios/web/public/favicon_status.h"
+#include "ios/web/public/navigation_item.h"
+#include "ios/web/public/referrer.h"
+#include "ios/web/public/ssl_status.h"
+#include "url/gurl.h"
+
+namespace web {
+
+// Implementation of NavigationItem.
+class NavigationItemImpl : public web::NavigationItem {
+ public:
+  // Creates a default NavigationItemImpl.
+  NavigationItemImpl();
+  virtual ~NavigationItemImpl();
+
+  // NavigationItem implementation:
+  virtual int GetUniqueID() const override;

[rohitrao (ping after 24h), 2014/10/23 20:29:37]

Forgot about these virtuals.  If I clean them up in an upstream change next
week, we should be able to avoid merge conflicts.  Is it ok to wait?

+  virtual void SetURL(const GURL& url) override;
+  virtual const GURL& GetURL() const override;
+  virtual void SetReferrer(const web::Referrer& referrer) override;
+  virtual const web::Referrer& GetReferrer() const override;
+  virtual void SetVirtualURL(const GURL& url) override;
+  virtual const GURL& GetVirtualURL() const override;
+  virtual void SetTitle(const base::string16& title) override;
+  virtual const base::string16& GetTitle() const override;
+  virtual void SetPageID(int page_id) override;
+  virtual int32 GetPageID() const override;
+  virtual const base::string16& GetTitleForDisplay(
+      const std::string& languages) const override;
+  virtual void SetTransitionType(ui::PageTransition transition_type) override;
+  virtual ui::PageTransition GetTransitionType() const override;
+  virtual const FaviconStatus& GetFavicon() const override;
+  virtual FaviconStatus& GetFavicon() override;
+  virtual const SSLStatus& GetSSL() const override;
+  virtual SSLStatus& GetSSL() override;
+  virtual void SetTimestamp(base::Time timestamp) override;
+  virtual base::Time GetTimestamp() const override;
+
+ private:
+  int unique_id_;
+  GURL url_;
+  Referrer referrer_;
+  GURL virtual_url_;
+  base::string16 title_;
+  int32 page_id_;
+  ui::PageTransition transition_type_;
+  FaviconStatus favicon_;
+  SSLStatus ssl_;
+  base::Time timestamp_;
+
+  // This is a cached version of the result of GetTitleForDisplay. When the URL,
+  // virtual URL, or title is set, this should be cleared to force a refresh.
+  mutable base::string16 cached_display_title_;
+
+  // Copy and assignment is explicitly allowed for this class.
+};
+
+}  // namespace web
+
+#endif  // IOS_WEB_NAVIGATION_NAVIGATION_ITEM_IMPL_H_