Rename navigation_types.h to navigation_type.h to match the rest of the enum files.

content/content_browser.gypi

 # Copyright (c) 2011 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.
 
 {
   'dependencies': [
     '../crypto/crypto.gyp:crypto',
     '../net/net.gyp:http_server',
     '../net/net.gyp:net',
     '../ppapi/ppapi_internal.gyp:ppapi_proxy',
@@ skipping 14 matching lines @@
   ],
   'sources': [
     'public/browser/browser_main_parts.h',
     'public/browser/browser_shutdown.h',
     'public/browser/browser_thread.h',
     'public/browser/browser_thread_delegate.h',
     'public/browser/content_browser_client.h',
     'public/browser/content_ipc_logging.h',
     'public/browser/download_manager_delegate.h',
     'public/browser/native_web_keyboard_event.h',
-    'public/browser/navigation_types.h',
+    'public/browser/navigation_type.h',
     'public/browser/notification_details.h',
     'public/browser/notification_observer.h',
     'public/browser/notification_registrar.cc',
     'public/browser/notification_registrar.h',
     'public/browser/notification_service.h',
     'public/browser/notification_source.h',
     'public/browser/notification_types.h',
     'public/browser/plugin_data_remover.h',
     'public/browser/render_process_host.h',
     'public/browser/render_process_host_factory.h',
@@ skipping 733 matching lines @@
         'ENABLE_JAVA_BRIDGE',
       ],
     }, {
       'sources/': [
         ['exclude', '^browser/renderer_host/java/'],
       ],
     }],
   ],
 }