Partial revert of r357449 to keep Flash 19.x working.

ppapi/ppapi_sources.gypi

 # 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.
 
 {
   'variables': {
     'c_source_files': [
       'c/pp_array_output.h',
       'c/pp_bool.h',
       'c/pp_codecs.h',
@@ skipping 66 matching lines @@
       'c/ppp_mouse_lock.h',
 
       # Dev interfaces.
       'c/dev/pp_cursor_type_dev.h',
       'c/dev/pp_video_dev.h',
       'c/dev/ppb_buffer_dev.h',
       'c/dev/ppb_char_set_dev.h',
       'c/dev/ppb_cursor_control_dev.h',
       'c/dev/ppb_device_ref_dev.h',
       'c/dev/ppb_file_chooser_dev.h',
+      'c/dev/ppb_font_dev.h',
       'c/dev/ppb_ime_input_event_dev.h',
       'c/dev/ppb_memory_dev.h',
       'c/dev/ppb_printing_dev.h',
       'c/dev/ppb_text_input_dev.h',
       'c/dev/ppb_truetype_font_dev.h',
       'c/dev/ppb_url_util_dev.h',
       'c/dev/ppb_video_decoder_dev.h',
       'c/dev/ppp_network_state_dev.h',
       'c/dev/ppp_text_input_dev.h',
       'c/dev/ppp_video_decoder_dev.h',
@@ skipping 467 matching lines @@
       'tests/test_x509_certificate_private.h',
 
       # Deprecated test cases.
       'tests/test_instance_deprecated.cc',
       'tests/test_instance_deprecated.h',
       'tests/test_var_deprecated.cc',
       'tests/test_var_deprecated.h',
     ],
   },
 }