Update installer files now that PDF plugin is gone.

chrome/tools/build/chromeos/FILES.cfg

 # -*- python -*-
 # ex: set syntax=python:
 
 # 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.
 
 # This is a buildbot configuration file containing a tagged list of files
 # processed by the stage/archive scripts. The known tags are:
 #
@@ skipping 95 matching lines @@
     'filename': 'libwidevinecdmadapter.so',
     'arch': ['32bit', '64bit', 'arm'],
     'buildtype': ['official'],
   },
   {
     'filename': 'libwidevinecdm.so',
     'arch': ['32bit', '64bit', 'arm'],
     'buildtype': ['official'],
     'direct_archive': 1,
   },
-  # PDF Plugin files:
-  {
-    'filename': 'libpdf.so',
-    'buildtype': ['dev', 'official'],
-  },
   # Native Client plugin files:
   {
     'filename': 'nacl_irt_x86_32.nexe',
     'arch': ['32bit'],
     'buildtype': ['dev', 'official'],
   },
   {
     'filename': 'nacl_irt_x86_64.nexe',
     'arch': ['64bit'],
     'buildtype': ['dev', 'official'],
   },
   {
     'filename': 'nacl_helper',
     'buildtype': ['dev', 'official'],
   },
   {
     'filename': 'nacl_helper_bootstrap',
     'buildtype': ['dev', 'official'],
   },
 ]