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

chrome/renderer/net/net_error_helper.h

Index: chrome/renderer/net/net_error_helper.h
diff --git a/chrome/renderer/net/net_error_helper.h b/chrome/renderer/net/net_error_helper.h
index 935cd5df1f241e8ede567f23b3483f0d8d3a6fac..01d900e5d643f460ef86886aed684d56b8d581b1 100644
--- a/chrome/renderer/net/net_error_helper.h
+++ b/chrome/renderer/net/net_error_helper.h
@@ -6,6 +6,7 @@
 #define CHROME_RENDERER_NET_NET_ERROR_HELPER_H_
 
 #include <string>
+#include <vector>
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
@@ -83,19 +84,21 @@ class NetErrorHelper
       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;
@@ -106,6 +109,7 @@ class NetErrorHelper
   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(
@@ -121,9 +125,12 @@ class NetErrorHelper
 
   void OnTrackingRequestComplete(const blink::WebURLResponse& response,
                                  const std::string& data);
+
 #if defined(OS_ANDROID)
-  void OnSetHasOfflinePages(bool has_offline_pages);
-#endif
+  // 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(const std::vector<GURL>& offline_page_urls);
+#endif  // defined(OS_ANDROID)
 
   scoped_ptr<content::ResourceFetcher> correction_fetcher_;
   scoped_ptr<content::ResourceFetcher> tracking_fetcher_;