Move view_types.h to view_type.h, since that's the standard name for enums.

content/content_common.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': [
     '../base/base.gyp:base',
     '../build/temp_gyp/googleurl.gyp:googleurl',
     '../gpu/gpu.gyp:gpu_ipc',
     '../ipc/ipc.gyp:ipc',
@@ skipping 53 matching lines @@
     'public/common/show_desktop_notification_params.cc',
     'public/common/show_desktop_notification_params.h',
     'public/common/speech_input_result.cc',
     'public/common/speech_input_result.h',
     'public/common/stop_find_action.h',
     'public/common/url_constants.cc',
     'public/common/url_constants.h',
     'public/common/url_fetcher.h',
     'public/common/url_fetcher_delegate.h',
     'public/common/url_fetcher_factory.h',
-    'public/common/view_types.h',
+    'public/common/view_type.h',
     'public/common/zygote_fork_delegate_linux.h',
     'common/appcache/appcache_backend_proxy.cc',
     'common/appcache/appcache_backend_proxy.h',
     'common/appcache/appcache_dispatcher.cc',
     'common/appcache/appcache_dispatcher.h',
     'common/appcache_messages.h',
     'common/child_process.cc',
     'common/child_process.h',
     'common/child_process_host.cc',
     'common/child_process_host.h',
@@ skipping 228 matching lines @@
       ],
       'link_settings': {
         'libraries': [
           '-lEGL',
           '-lGLESv2',
         ],
       },
     }],
   ],
 }