Add "SHOW ALL SAVED PAGES" button to offline error page

chrome/browser/android/tab_android.cc

Index: chrome/browser/android/tab_android.cc
diff --git a/chrome/browser/android/tab_android.cc b/chrome/browser/android/tab_android.cc
index 029e63695cdff20bfe14a7672cf6999de2d29ced..2d0e15b561ec78ae2a5e4b15d6782c5c23994661 100644
--- a/chrome/browser/android/tab_android.cc
+++ b/chrome/browser/android/tab_android.cc
@@ -287,6 +287,20 @@ void TabAndroid::MakeLoadURLParams(
   }
 }
 
+bool TabAndroid::HasOfflinePages() const {
+   if (!offline_pages::IsOfflinePagesEnabled())
+    return false;
+  offline_pages::OfflinePageModel* offline_page_model =
+      offline_pages::OfflinePageModelFactory::GetForBrowserContext(
+          GetProfile());
+  return !offline_page_model->GetAllPages().empty();
+}
+
+void TabAndroid::ShowOfflinePages() {
+  JNIEnv* env = base::android::AttachCurrentThread();
+  Java_Tab_showOfflinePages(env, weak_java_tab_.get(env).obj());
+}
+
 void TabAndroid::SwapTabContents(content::WebContents* old_contents,
                                  content::WebContents* new_contents,
                                  bool did_start_load,