Showing previews UI for Offline Previews

chrome/browser/loader/chrome_navigation_data.h

 // Copyright 2016 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 CHROME_BROWSER_LOADER_CHROME_NAVIGATION_DATA_H_
 #define CHROME_BROWSER_LOADER_CHROME_NAVIGATION_DATA_H_
 
 #include <memory>
 
 #include "base/macros.h"
 #include "base/supports_user_data.h"
 #include "content/public/browser/navigation_data.h"
 
+namespace content {
+class NavigationHandle;
+}
+
 namespace data_reduction_proxy {
 class DataReductionProxyData;
 }
 
 namespace net {
 class URLRequest;
 }
 
+namespace offline_pages {
+class LoadedOfflinePageInfo;
+}
+
 class ChromeNavigationData : public content::NavigationData,
                              public base::SupportsUserData::Data {
  public:
   ChromeNavigationData();
   ~ChromeNavigationData() override;
 
   // Creates a new ChromeNavigationData that is a deep copy of the original. Any
   // changes to the original after the clone is created will not be reflected in
   // the clone.
   // |data_reduction_proxy_data_| is deep copied.
   std::unique_ptr<content::NavigationData> Clone() const override;
 
   // Takes ownership of |data_reduction_proxy_data|.
   void SetDataReductionProxyData(
       std::unique_ptr<data_reduction_proxy::DataReductionProxyData>
-          data_reduction_proxy_data) {
-    data_reduction_proxy_data_ = std::move(data_reduction_proxy_data);
-  }
+          data_reduction_proxy_data);
 
   data_reduction_proxy::DataReductionProxyData* GetDataReductionProxyData()
       const {
     return data_reduction_proxy_data_.get();
   }
 
+  // Takes ownership of |loaded_offline_page_info|.
+  void SetLoadedOfflinePageInfo(
+      std::unique_ptr<offline_pages::LoadedOfflinePageInfo>
+          loaded_offline_page_info);
+
+  offline_pages::LoadedOfflinePageInfo* GetLoadedOfflinePageInfo() const {
+    return loaded_offline_page_info_.get();
+  }
+
   static ChromeNavigationData* GetDataAndCreateIfNecessary(
       net::URLRequest* request);
 
+  static ChromeNavigationData* GetForNavigationHandle(
+      content::NavigationHandle* navigation_handle);
+
  private:
   // Manages the lifetime of optional DataReductionProxy information.
   std::unique_ptr<data_reduction_proxy::DataReductionProxyData>
       data_reduction_proxy_data_;
 
+  // Manages the lifetime of optional LoadedOfflinePageInfo information.
+  std::unique_ptr<offline_pages::LoadedOfflinePageInfo>
+      loaded_offline_page_info_;
+
   DISALLOW_COPY_AND_ASSIGN(ChromeNavigationData);
 };
 
 #endif  // CHROME_BROWSER_LOADER_CHROME_NAVIGATION_DATA_H_