Remove old WebSocket implementation from content/

content/content_common.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.
 
 {
   'dependencies': [
     '../base/base.gyp:base',
     '../components/tracing.gyp:tracing',
     '../gpu/command_buffer/command_buffer.gyp:gles2_utils',
     '../net/net.gyp:net',
@@ skipping 467 matching lines @@
       'common/service_worker/embedded_worker_messages.h',
       'common/service_worker/service_worker_messages.h',
       'common/service_worker/service_worker_status_code.cc',
       'common/service_worker/service_worker_status_code.h',
       'common/service_worker/service_worker_types.cc',
       'common/service_worker/service_worker_types.h',
       'common/set_process_title.cc',
       'common/set_process_title.h',
       'common/set_process_title_linux.cc',
       'common/set_process_title_linux.h',
-      'common/socket_stream.h',
-      'common/socket_stream_handle_data.h',
-      'common/socket_stream_messages.h',
       'common/speech_recognition_messages.h',
       'common/ssl_status_serialization.cc',
       'common/ssl_status_serialization.h',
       'common/swapped_out_messages.cc',
       'common/swapped_out_messages.h',
       'common/text_input_client_messages.h',
       'common/url_schemes.cc',
       'common/url_schemes.h',
       'common/user_agent.cc',
       'common/utility_messages.h',
@@ skipping 417 matching lines @@
       ],
       'sources': [
         'common/gpu/client/gpu_memory_buffer_impl_ozone.cc',
       ],
       'sources!': [
         'common/gpu/client/gpu_memory_buffer_impl_linux.cc',
       ],
     }],
   ],
 }