Extend content::DesktopMediaID to allow Aura windows as capture sources.

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.
 
 {
   'dependencies': [
     '../base/base.gyp:base_static',
     '../crypto/crypto.gyp:crypto',
     '../google_apis/google_apis.gyp:google_apis',
     '../net/net.gyp:net',
@@ skipping 53 matching lines @@
     'public/browser/browser_thread.h',
     'public/browser/browser_thread_delegate.h',
     'public/browser/cert_store.h',
     'public/browser/child_process_data.h',
     'public/browser/child_process_security_policy.h',
     'public/browser/color_chooser.h',
     'public/browser/certificate_request_result_type.h',
     'public/browser/content_browser_client.cc',
     'public/browser/content_browser_client.h',
     'public/browser/cookie_store_factory.h',
+    'public/browser/desktop_media_id.cc',
+    'public/browser/desktop_media_id.h',
     'public/browser/devtools_agent_host.h',
     'public/browser/devtools_client_host.h',
     'public/browser/devtools_external_agent_proxy.h',
     'public/browser/devtools_external_agent_proxy_delegate.h',
     'public/browser/download_danger_type.h',
     'public/browser/devtools_frontend_host_delegate.h',
     'public/browser/devtools_http_handler.h',
     'public/browser/devtools_http_handler_delegate.h',
     'public/browser/devtools_manager.h',
     'public/browser/devtools_target.h',
@@ skipping 1539 matching lines @@
         '../build/linux/system.gyp:dbus',
         '../dbus/dbus.gyp:dbus',
       ],
     }, {  # OS != "linux" or use_dbus==0
       'sources!': [
         'browser/geolocation/wifi_data_provider_linux.cc',
       ],
     }],
   ],
 }