Add the pdf plugin's source in src\pdf.

chrome/chrome_dll_bundle.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.
 
 # This file contains resources for the main Mac chromium bundle.
 {
   # The main browser executable's name is <(mac_product_name).
   # Certain things will get confused if two modules in the
   # executable share the same name, so append " Framework" to the
   # product_name used for the framework.  This will result in
@@ skipping 58 matching lines @@
     # common.gypi for more info.
   ],
   'mac_bundle_resources!': [
     'app/framework-Info.plist',
   ],
   'dependencies': [
     'app_mode_app',
     # Bring in pdfsqueeze and run it on all pdfs
     '../build/temp_gyp/pdfsqueeze.gyp:pdfsqueeze',
     '../crypto/crypto.gyp:crypto',
+    '../pdf/pdf.gyp:pdf',
     # On Mac, Flash gets put into the framework, so we need this
     # dependency here. flash_player.gyp will copy the Flash bundle
     # into PRODUCT_DIR.
     '../third_party/adobe/flash/flash_player.gyp:flapper_binaries',
     '../third_party/widevine/cdm/widevine_cdm.gyp:widevinecdmadapter',
     'chrome_resources.gyp:packed_extra_resources',
     'chrome_resources.gyp:packed_resources',
   ],
   'rules': [
     {
@@ skipping 50 matching lines @@
   'copies': [
     {
       'destination': '<(PRODUCT_DIR)/$(CONTENTS_FOLDER_PATH)/Libraries',
       'files': [
         '<(PRODUCT_DIR)/exif.so',
         '<(PRODUCT_DIR)/ffmpegsumo.so',
       ],
     },
     {
       'destination': '<(PRODUCT_DIR)/$(CONTENTS_FOLDER_PATH)/Internet Plug-Ins',
-      'files': [],
+      'files': [
+        '<(PRODUCT_DIR)/PDF.plugin',
+      ],
       'conditions': [
-        ['internal_pdf', {
-          'files': [
-            '<(PRODUCT_DIR)/PDF.plugin',
-          ],
-        }],
         ['disable_nacl!=1', {
           'files': [
             '<(PRODUCT_DIR)/ppGoogleNaClPluginChrome.plugin',
           ],
           'conditions': [
             ['target_arch=="x64"', {
               'files': [
                 '<(PRODUCT_DIR)/nacl_irt_x86_64.nexe',
               ],
             }, {
@@ skipping 105 matching lines @@
           'postbuild_name': 'Symlink Frameworks',
           'action': [
             'ln',
             '-fns',
             'Versions/Current/Frameworks',
             '${BUILT_PRODUCTS_DIR}/${WRAPPER_NAME}/Frameworks'
           ],
         },
       ],
     }],  # mac_keystone
-    ['internal_pdf', {
-      'dependencies': [
-        '../pdf/pdf.gyp:pdf',
-      ],
-    }],
     ['debug_devtools==1', {
       'postbuilds': [{
         'postbuild_name': 'Copy inspector files',
         'action': [
           'ln',
           '-fs',
           '${BUILT_PRODUCTS_DIR}/resources/inspector',
           '${BUILT_PRODUCTS_DIR}/${CONTENTS_FOLDER_PATH}/Resources',
         ],
       }],
@@ skipping 11 matching lines @@
         ],
       }],
     }],
     ['icu_use_data_file_flag==1', {
       'mac_bundle_resources': [
         '<(PRODUCT_DIR)/icudtl.dat',
       ],
     }],
   ],  # conditions
 }