Add "Show saved copy" button in dino page when there's offline copy

chrome/renderer/net/net_error_helper.h

 // Copyright (c) 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 CHROME_RENDERER_NET_NET_ERROR_HELPER_H_
 #define CHROME_RENDERER_NET_NET_ERROR_HELPER_H_
 
 #include <string>
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/renderer/net/net_error_page_controller.h"
 #include "components/error_page/common/net_error_info.h"
+#include "components/error_page/common/offline_page_types.h"
 #include "components/error_page/renderer/net_error_helper_core.h"
 #include "content/public/renderer/render_frame_observer.h"
 #include "content/public/renderer/render_frame_observer_tracker.h"
 #include "content/public/renderer/render_process_observer.h"
 
 class GURL;
 
 namespace blink {
 class WebFrame;
 class WebURLResponse;
@@ skipping 51 matching lines @@
   // Returns whether a load for |url| in the |frame| the NetErrorHelper is
   // attached to should have its error page suppressed.
   bool ShouldSuppressErrorPage(const GURL& url);
 
  private:
   // NetErrorHelperCore::Delegate implementation:
   void GenerateLocalizedErrorPage(
       const blink::WebURLError& error,
       bool is_failed_post,
       bool can_use_local_diagnostics_service,
-      bool has_offline_pages,
+      error_page::OfflinePageStatus offline_page_status,
       scoped_ptr<error_page::ErrorPageParams> params,
       bool* reload_button_shown,
       bool* show_saved_copy_button_shown,
       bool* show_cached_copy_button_shown,
-      bool* show_saved_pages_button_shown,
+      bool* show_offline_pages_button_shown,
+      bool* show_offline_copy_button_shown,
       std::string* html) const override;
   void LoadErrorPage(const std::string& html, const GURL& failed_url) override;
   void EnablePageHelperFunctions() override;
-  void UpdateErrorPage(const blink::WebURLError& error,
-                       bool is_failed_post,
-                       bool can_use_local_diagnostics_service,
-                       bool has_offline_pages) override;
+  void UpdateErrorPage(
+      const blink::WebURLError& error,
+      bool is_failed_post,
+      bool can_use_local_diagnostics_service,
+      error_page::OfflinePageStatus offline_page_status) override;
   void FetchNavigationCorrections(
       const GURL& navigation_correction_url,
       const std::string& navigation_correction_request_body) override;
   void CancelFetchNavigationCorrections() override;
   void SendTrackingRequest(const GURL& tracking_url,
                            const std::string& tracking_request_body) override;
   void ReloadPage(bool ignore_cache) override;
   void LoadPageFromCache(const GURL& page_url) override;
   void DiagnoseError(const GURL& page_url) override;
   void ShowOfflinePages() override;
+  void LoadOfflineCopy(const GURL& page_url) override;
 
   void OnNetErrorInfo(int status);
   void OnSetCanShowNetworkDiagnosticsDialog(
       bool can_use_local_diagnostics_service);
   void OnSetNavigationCorrectionInfo(const GURL& navigation_correction_url,
                                      const std::string& language,
                                      const std::string& country_code,
                                      const std::string& api_key,
                                      const GURL& search_url);
 
   void OnNavigationCorrectionsFetched(const blink::WebURLResponse& response,
                                       const std::string& data);
 
   void OnTrackingRequestComplete(const blink::WebURLResponse& response,
                                  const std::string& data);
+
 #if defined(OS_ANDROID)
-  void OnSetHasOfflinePages(bool has_offline_pages);
+  // Called to set the status of the offline pages that will be used to decide
+  // if offline related button will be provided in the error page.
+  void OnSetOfflinePageInfo(error_page::OfflinePageStatus offline_page_status);
 #endif
 
   scoped_ptr<content::ResourceFetcher> correction_fetcher_;
   scoped_ptr<content::ResourceFetcher> tracking_fetcher_;
 
   scoped_ptr<error_page::NetErrorHelperCore> core_;
 
   // Weak factory for vending a weak pointer to a NetErrorPageController. Weak
   // pointers are invalidated on each commit, to prevent getting messages from
   // Controllers used for the previous commit that haven't yet been cleaned up.
   base::WeakPtrFactory<NetErrorPageController::Delegate>
       weak_controller_delegate_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(NetErrorHelper);
 };
 
 #endif  // CHROME_RENDERER_NET_NET_ERROR_HELPER_H_