Add support for PTZ via VISCA.

extensions/extensions.gypi

 # Copyright 2015 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': {
     'extensions_common_constants_sources': [
       'common/constants.cc',
       'common/constants.h',
     ],
@@ skipping 789 matching lines @@
       'browser/api/networking_config/networking_config_service_factory.h',
       'browser/api/socket/app_firewall_hole_manager.cc',
       'browser/api/socket/app_firewall_hole_manager.h',
       'browser/api/vpn_provider/vpn_provider_api.cc',
       'browser/api/vpn_provider/vpn_provider_api.h',
       'browser/api/vpn_provider/vpn_service.cc',
       'browser/api/vpn_provider/vpn_service.h',
       'browser/api/vpn_provider/vpn_service_factory.h',
       'browser/api/webcam_private/v4l2_webcam.h',
       'browser/api/webcam_private/v4l2_webcam.cc',
+      'browser/api/webcam_private/visca_webcam.h',
+      'browser/api/webcam_private/visca_webcam.cc',
       'browser/api/webcam_private/webcam.h',
       'browser/api/webcam_private/webcam.cc',
       'browser/api/webcam_private/webcam_private_api.h',
       'browser/api/webcam_private/webcam_private_api_chromeos.cc',
     ],
     'extensions_browser_sources_nonchromeos': [
       'browser/api/audio/audio_service.cc',
       'browser/api/document_scan/document_scan_interface_nonchromeos.cc',
     ],
     'extensions_browser_sources_win_or_mac': [
@@ skipping 226 matching lines @@
       'test/result_catcher.h',
       'test/test_content_utility_client.cc',
       'test/test_content_utility_client.h',
       'test/test_extensions_client.cc',
       'test/test_extensions_client.h',
       'test/test_permission_message_provider.cc',
       'test/test_permission_message_provider.h',
     ],
   },
 }