Fix chromeos=1 so Pulse is preferred when use_cras=0.

media/media.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': {
     'chromium_code': 1,
     # Override to dynamically link the cras (ChromeOS audio) library.
     'use_cras%': 0,
     # Option e.g. for Linux distributions to link pulseaudio directly
     # (DT_NEEDED) instead of using dlopen. This helps with automated
     # detection of ABI mismatches and prevents silent errors.
     'linux_link_pulseaudio%': 0,
     'conditions': [
       ['OS=="android"', {
         # Android doesn't use ffmpeg.
         'media_use_ffmpeg%': 0,
         # Android doesn't use libvpx.
         'media_use_libvpx%': 0,
       }, {  # 'OS!="android"'
         'media_use_ffmpeg%': 1,
         'media_use_libvpx%': 1,
       }],
-      # ALSA usage.
-      ['(OS=="linux" or OS=="freebsd" or OS=="solaris") and embedded!=1', {
+      # Enable ALSA and Pulse for runtime selection.
+      ['(OS=="linux" or OS=="freebsd" or OS=="solaris") and embedded!=1 and use_cras==0', {
         'use_alsa%': 1,
+        'use_pulseaudio%': 1,
       }, {
         'use_alsa%': 0,
-      }],
-      ['os_posix==1 and OS!="mac" and OS!="android" and chromeos!=1 and embedded!=1', {
-        'use_pulseaudio%': 1,
-      }, {
         'use_pulseaudio%': 0,
       }],
     ],
   },
   'includes': [
     'media_cdm.gypi',
   ],
   'targets': [
     {
       'target_name': 'media',
@@ skipping 1606 matching lines @@
                   ],
                 }],
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }