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

chrome/common/localized_error.h

Index: chrome/common/localized_error.h
diff --git a/chrome/common/localized_error.h b/chrome/common/localized_error.h
index 32374818b82ba0f713bf909b4420830919f0f110..5887ddd1cd4a34e8f2459e05cd790b3c18b0c1e5 100644
--- a/chrome/common/localized_error.h
+++ b/chrome/common/localized_error.h
@@ -10,6 +10,7 @@
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string16.h"
+#include "components/error_page/common/offline_page_types.h"
 #include "url/gurl.h"
 
 namespace base {
@@ -26,6 +27,7 @@ struct ErrorPageParams;
 
 class LocalizedError {
  public:
+
   // Fills |error_strings| with values to be used to build an error page used
   // on HTTP errors, like 404 or connection reset.
   static void GetStrings(int error_code,
@@ -34,7 +36,7 @@ class LocalizedError {
                          bool is_post,
                          bool stale_copy_in_cache,
                          bool can_show_network_diagnostics_dialog,
-                         bool has_offline_pages,
+                         error_page::OfflinePageStatus offline_page_status,
                          const std::string& locale,
                          const std::string& accept_languages,
                          scoped_ptr<error_page::ErrorPageParams> params,