Fix the disappearance of "Offline" chip from the LocationBar when navigating to a fragment.

chrome/browser/android/offline_pages/offline_page_tab_helper.h

Index: chrome/browser/android/offline_pages/offline_page_tab_helper.h
diff --git a/chrome/browser/android/offline_pages/offline_page_tab_helper.h b/chrome/browser/android/offline_pages/offline_page_tab_helper.h
index 392213d24c74f0eb299302f485009698583bc971..44f912568676bbda7a9b9428af2abde5313492c5 100644
--- a/chrome/browser/android/offline_pages/offline_page_tab_helper.h
+++ b/chrome/browser/android/offline_pages/offline_page_tab_helper.h
@@ -52,6 +52,11 @@ class OfflinePageTabHelper :
   // tab. This can be used to by the Tab to synchronously ask about the offline
   // info.
   std::unique_ptr<OfflinePageItem> offline_page_;
+  // Potential new offline page copy. This is reset to nullptr at the start
+  // of every navigation and set by network request interceptor. If the
+  // interceptor decided to not use offline page for the navigation or was not
+  // even invoked (as in case with fragment navigation), this stays nullptr.
+  std::unique_ptr<OfflinePageItem> new_offline_page_;
 
   bool reloading_url_on_net_error_ = false;