Allow input & clipboard filters to be disabled without NULLing target stub.

remoting/remoting.gyp

 # 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': {
     # TODO(dmaclach): can we pick this up some other way? Right now it's
     # duplicated from chrome.gyp
     'chromium_code': 1,
 
@@ skipping 1748 matching lines @@
         'jingle_glue/fake_signal_strategy.cc',
         'jingle_glue/fake_signal_strategy.h',
         'jingle_glue/iq_sender_unittest.cc',
         'jingle_glue/mock_objects.cc',
         'jingle_glue/mock_objects.h',
         'protocol/authenticator_test_base.cc',
         'protocol/authenticator_test_base.h',
         'protocol/buffered_socket_writer_unittest.cc',
         'protocol/channel_multiplexer_unittest.cc',
         'protocol/clipboard_echo_filter_unittest.cc',
+        'protocol/clipboard_filter_unittest.cc',
         'protocol/connection_tester.cc',
         'protocol/connection_tester.h',
         'protocol/connection_to_client_unittest.cc',
         'protocol/content_description_unittest.cc',
         'protocol/fake_authenticator.cc',
         'protocol/fake_authenticator.h',
         'protocol/fake_session.cc',
         'protocol/fake_session.h',
+        'protocol/input_event_tracker_unittest.cc',
+        'protocol/input_filter_unittest.cc',
         'protocol/jingle_messages_unittest.cc',
         'protocol/jingle_session_unittest.cc',
-        'protocol/input_event_tracker_unittest.cc',
         'protocol/message_decoder_unittest.cc',
         'protocol/message_reader_unittest.cc',
         'protocol/mouse_input_filter_unittest.cc',
         'protocol/negotiating_authenticator_unittest.cc',
         'protocol/protocol_mock_objects.cc',
         'protocol/protocol_mock_objects.h',
         'protocol/ppapi_module_stub.cc',
         'protocol/ssl_hmac_channel_authenticator_unittest.cc',
         'protocol/v2_authenticator_unittest.cc',
         'run_all_unittests.cc',
@@ skipping 32 matching lines @@
                   '../base/allocator/allocator.gyp:allocator',
                 ],
               },
             ],
           ],
         }],
       ],  # end of 'conditions'
     },  # end of target 'remoting_unittests'
   ],  # end of targets
 }