pdf: Create a separate component for using the pdf pepper plugin.

chrome/chrome_browser.gypi

 # Copyright 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': {
     # All .cc, .h, .m, and .mm files under browser except for:
     # * tests and mocks.
     # * code below browser/chromeos
     # * code below browser/extensions
@@ skipping 3071 matching lines @@
               'dependencies': [
                 'policy_path_parser',
               ],
             }],
           ],
         }, {  # configuration_policy==0
           'sources': [ '<@(chrome_browser_policy_disabled_sources)' ],
         }],
         ['enable_plugins==1', {
           'dependencies': [
+            '../components/components.gyp:pdf_browser',
             '../ppapi/ppapi_internal.gyp:ppapi_ipc',
             '../third_party/adobe/flash/flash_player.gyp:flapper_version_h',
           ],
           'sources': [ '<@(chrome_browser_plugins_sources)' ],
         }],
         ['safe_browsing != 0', {
           'sources': [ '<@(chrome_browser_basic_safe_browsing_sources)' ],
           'dependencies': [
             'safe_browsing_chunk_proto',
             'safe_browsing_report_proto',
@@ skipping 474 matching lines @@
           'variables': {
             'proto_in_dir': 'browser/sync_file_system/drive_backend',
             'proto_out_dir': 'chrome/browser/sync_file_system/drive_backend',
           },
           'includes': [ '../build/protoc.gypi' ]
         },
       ],
     },],
   ],
 }