Use the WebKit default fonts when specifying generic font families.

ppapi/ppapi_shared.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.
 
 {
   'targets': [
     {
       'target_name': 'ppapi_shared',
       'type': 'static_library',
       'dependencies': [
@@ skipping 17 matching lines @@
         'shared_impl/audio_impl.cc',
         'shared_impl/audio_impl.h',
         'shared_impl/char_set_impl.cc',
         'shared_impl/char_set_impl.h',
         'shared_impl/crypto_impl.cc',
         'shared_impl/crypto_impl.h',
         'shared_impl/font_impl.cc',
         'shared_impl/font_impl.h',
         'shared_impl/image_data_impl.cc',
         'shared_impl/image_data_impl.h',
+        'shared_impl/ppapi_preferences.cc',
+        'shared_impl/ppapi_preferences.h',
         'shared_impl/tracker_base.cc',
         'shared_impl/tracker_base.h',
         'shared_impl/url_util_impl.cc',
         'shared_impl/url_util_impl.h',
         'shared_impl/webkit_forwarding.cc',
         'shared_impl/webkit_forwarding.h',
 
         'thunk/enter.h',
         'thunk/ppb_audio_api.h',
         'thunk/ppb_audio_config_api.h',
@@ skipping 10 matching lines @@
         'thunk/thunk.h',
       ],
       'conditions': [
         ['OS=="win"', {
           'msvs_guid': 'E7420D65-A885-41EB-B4BE-04DE0C97033B',
         }],
       ],
     },
   ],
 }