Remove the unused parts of PPB_PDF

components/pdf.gypi

 # Copyright 2014 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': {
     'chromium_code': 1,
   },
   'targets': [{
     'target_name': 'pdf_common',
@@ skipping 35 matching lines @@
       '<(DEPTH)/third_party/WebKit/public/blink.gyp:blink',
       'components_resources.gyp:components_resources',
       'components_strings.gyp:components_strings',
       'pdf_common',
     ],
     'sources': [
       'pdf/renderer/pdf_resource_util.cc',
       'pdf/renderer/pdf_resource_util.h',
       'pdf/renderer/pepper_pdf_host.cc',
       'pdf/renderer/pepper_pdf_host.h',
-      'pdf/renderer/ppb_pdf_impl.cc',
-      'pdf/renderer/ppb_pdf_impl.h',
     ],
     'conditions': [
       ['OS=="win"', {
           # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
           'msvs_disabled_warnings': [4267, ],
         },
       ],
     ],
   }],
 }