Add PluginServiceStub for builds with enable_plugins==0

content/content_tests.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.
 
 {
   'targets': [
     {
       'target_name': 'test_support_content',
       'type': 'static_library',
       'defines!': ['CONTENT_IMPLEMENTATION'],
@@ skipping 501 matching lines @@
             '../webkit/support/webkit_support.gyp:webkit_media',
             '../webkit/support/webkit_support.gyp:webkit_storage',
             '../webkit/webkit.gyp:test_shell_test_support',
           ],
         }],
         ['enable_plugins==0', {
           'sources/': [
             ['exclude', '^renderer/pepper/'],
             ['exclude', '^browser/renderer_host/pepper/'],
           ],
+          'sources!': [
+            'browser/plugin_loader_posix_unittest.cc',
+          ],
         }],
         ['enable_webrtc==1', {
           'sources': [
             'browser/renderer_host/p2p/socket_host_test_utils.h',
             'browser/renderer_host/p2p/socket_host_tcp_unittest.cc',
             'browser/renderer_host/p2p/socket_host_tcp_server_unittest.cc',
             'browser/renderer_host/p2p/socket_host_udp_unittest.cc',
             'renderer/media/media_stream_dependency_factory_unittest.cc',
             'renderer/media/media_stream_dispatcher_unittest.cc',
             'renderer/media/media_stream_impl_unittest.cc',
@@ skipping 418 matching lines @@
             'resource_dir': '../res',
             'additional_src_dirs': ['../content/public/android/javatests/'],
             'is_test_apk': 1,
           },
           'includes': [ '../build/java_apk.gypi' ],
         },
       ],
     }],
   ],
 }