Exclude content/plugin/ when plugins are disabled.

content/content_browser.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': {
     'conditions': [
       ['chromeos==1', {
         'use_libgps%': 1,
       }, { # chromeos==0
@@ skipping 1115 matching lines @@
         ['exclude', '^browser/renderer_host/render_widget_host_view_aura.h'],
         ['exclude', '^browser/renderer_host/tap_suppression_controller_aura.cc'],
       ],
     }],
     ['enable_plugins==1', {
       'dependencies': [
         '../ppapi/ppapi_internal.gyp:ppapi_ipc',
       ],
     }, {  # enable_plugins==0
       'sources!': [
+        'browser/plugin_data_remover_impl.cc',
+        'browser/plugin_data_remover_impl.h',
         'browser/ppapi_plugin_process_host.cc',
       ],
       'sources/': [
         ['exclude', '^browser/renderer_host/pepper/'],
       ],
     }],
     ['java_bridge==1', {
       'defines': [
         'ENABLE_JAVA_BRIDGE',
       ],
@@ skipping 16 matching lines @@
       # the USE_LIBGPS setting propagates to the "real" dependent target,
       # we use all_dependent_settings here.
       'all_dependent_settings': {
         'defines': [
           'USE_LIBGPS',
         ],
       },
     }],
   ],
 }