Report redirect UMA in offline interceptor

chrome/browser/android/offline_pages/offline_page_request_job.h

Index: chrome/browser/android/offline_pages/offline_page_request_job.h
diff --git a/chrome/browser/android/offline_pages/offline_page_request_job.h b/chrome/browser/android/offline_pages/offline_page_request_job.h
index eee2aa1bc16434287402be0b76c5946b1ba7e8d1..f06ebf18d271ba36a2b5db0baa3bb7f0e1ae2a49 100644
--- a/chrome/browser/android/offline_pages/offline_page_request_job.h
+++ b/chrome/browser/android/offline_pages/offline_page_request_job.h
@@ -50,6 +50,10 @@ class OfflinePageRequestJob : public net::URLRequestFileJob {
     NO_TAB_ID,
     NO_WEB_CONTENTS,
     SHOW_NET_ERROR_PAGE,
+    REDIRECTED_ON_DISCONNECTED_NETWORK,
+    REDIRECTED_ON_FLAKY_NETWORK,
+    REDIRECTED_ON_PROHIBITIVELY_SLOW_NETWORK,
+    REDIRECTED_ON_CONNECTED_NETWORK,
     AGGREGATED_REQUEST_RESULT_MAX
   };