Load live version when reloading an offline page on connected network

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 a0e5897d7a52551babfceaed467d0c6b6580238f..96e28b1e72a81b4519025e550ff4200e1fdfbe56 100644
--- a/chrome/browser/android/tab_android.cc
+++ b/chrome/browser/android/tab_android.cc
@@ -68,6 +68,7 @@
 #include "components/offline_pages/offline_page_feature.h"
 #include "components/offline_pages/offline_page_item.h"
 #include "components/offline_pages/offline_page_model.h"
+#include "components/offline_pages/request_header/offline_page_header.h"
 #include "components/sessions/content/content_live_tab.h"
 #include "components/sessions/core/tab_restore_service.h"
 #include "components/url_formatter/url_fixer.h"
@@ -833,6 +834,28 @@ ScopedJavaLocalRef<jobject> TabAndroid::GetOfflinePage(
       env, *offline_page);
 }
 
+ScopedJavaLocalRef<jstring> TabAndroid::GetOfflinePageHeaderForReload(
+    JNIEnv* env,
+    const base::android::JavaParamRef<jobject>& obj) {
+  const offline_pages::OfflinePageHeader* offline_header =
+      offline_pages::OfflinePageUtils::GetOfflineHeaderFromWebContents(
+          web_contents());
+  if (!offline_header)
+    return ScopedJavaLocalRef<jstring>();
+
+  // Only replaces the reason field with "reload" value that is used to trigger
+  // the network conditon check again in deciding whether to load the offline
+  // page. All other fields in the offline header should still carry to the
+  // reload request in order to keep the consistent behavior if we do decide to
+  // load the offline page. For example, "id" field should be kept in order to
+  // load the same offline version again if desired.
+  offline_pages::OfflinePageHeader offline_header_for_reload = *offline_header;
+  offline_header_for_reload.reason =
+      offline_pages::OfflinePageHeader::Reason::RELOAD;
+  return ScopedJavaLocalRef<jstring>(ConvertUTF8ToJavaString(
+      env, offline_header_for_reload.GetCompleteHeaderString()));
+}
+
 bool TabAndroid::HasPrerenderedUrl(JNIEnv* env,
                                    const JavaParamRef<jobject>& obj,
                                    const JavaParamRef<jstring>& url) {