Load offline page if reading list entry takes more than 1s to load.

ui/base/page_transition_types.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_BASE_PAGE_TRANSITION_TYPES_H_
 #define UI_BASE_PAGE_TRANSITION_TYPES_H_
 
 #include <stdint.h>
 
 #include "ui/base/ui_base_export.h"
@@ skipping 82 matching lines @@
   // url 'http://' + keyword. For example, if you do a tab-to-search against
   // wikipedia the generated url has a transition qualifer of KEYWORD, and
   // TemplateURLModel generates a visit for 'wikipedia.org' with a transition
   // type of KEYWORD_GENERATED.
   PAGE_TRANSITION_KEYWORD = 9,
 
   // Corresponds to a visit generated for a keyword. See description of
   // KEYWORD for more details.
   PAGE_TRANSITION_KEYWORD_GENERATED = 10,
 
+  // Corresponds to a visit generated for a keyword. See description of
+  // KEYWORD for more details.
+  PAGE_TRANSITION_READING_LIST = 11,
+
   // ADDING NEW CORE VALUE? Be sure to update the LAST_CORE and CORE_MASK
   // values below.  Also update CoreTransitionString().
-  PAGE_TRANSITION_LAST_CORE = PAGE_TRANSITION_KEYWORD_GENERATED,
+  PAGE_TRANSITION_LAST_CORE = PAGE_TRANSITION_READING_LIST,
   PAGE_TRANSITION_CORE_MASK = 0xFF,
 
   // Qualifiers
   // Any of the core values above can be augmented by one or more qualifiers.
   // These qualifiers further define the transition.
 
   // A managed user attempted to visit a URL but was blocked.
   PAGE_TRANSITION_BLOCKED = 0x00800000,
 
   // User used the Forward or Back button to navigate among browsing history.
@@ skipping 80 matching lines @@
 // PageTransitionCoreTypeIs() instead or, in rare cases,
 // PageTransitionTypeIncludingQualifiersIs().
 DontUseOperatorEquals operator==(PageTransition, PageTransition);
 DontUseOperatorEquals operator==(PageTransition, int);
 DontUseOperatorEquals operator==(int, PageTransition);
 #endif  // defined(CONTENT_IMPLEMENTATION)
 
 }  // namespace ui
 
 #endif  // UI_BASE_PAGE_TRANSITION_TYPES_H_