Linux: provide a gyp option not to use pulseaudio.

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,
     'conditions': [
@@ skipping 11 matching lines @@
         'screen_capture_supported%': 1,
       }, {
         'screen_capture_supported%': 0,
       }],
       # ALSA usage.
       ['OS=="linux" or OS=="freebsd" or OS=="solaris"', {
         'use_alsa%': 1,
       }, {
         'use_alsa%': 0,
       }],
+      ['os_posix == 1 and OS != "mac" and OS != "ios" and OS != "android" and chromeos != 1', {
+        'use_pulseaudio%': 1,
+      }, {
+        'use_pulseaudio%': 0,
+      }],
     ],
   },
   'targets': [
     {
       'target_name': 'media',
       'type': '<(component)',
       'dependencies': [
         '../base/base.gyp:base',
         '../build/temp_gyp/googleurl.gyp:googleurl',
         '../crypto/crypto.gyp:crypto',
@@ skipping 599 matching lines @@
         ['OS!="linux"', {
           'sources!': [
             'audio/cras/audio_manager_cras.cc',
             'audio/cras/audio_manager_cras.h',
             'audio/cras/cras_input.cc',
             'audio/cras/cras_input.h',
             'audio/cras/cras_output.cc',
             'audio/cras/cras_output.h',
           ],
         }],
-        ['os_posix == 1 and OS != "mac" and OS != "ios" and OS != "android" and chromeos != 1', {
+        ['use_pulseaudio==1', {
           'defines': [
             'USE_PULSEAUDIO',
           ],
           'variables': {
             'generate_stubs_script': '../tools/generate_stubs/generate_stubs.py',
             'extra_header': 'audio/pulse/pulse_stub_header.fragment',
             'sig_files': ['audio/pulse/pulse.sigs'],
             'outfile_type': 'posix_stubs',
             'stubs_filename_root': 'pulse_stubs',
             'project_path': 'media/audio/pulse',
@@ skipping 35 matching lines @@
           'conditions': [
             # Linux/Solaris need libdl for dlopen() and friends.
             ['OS == "linux" or OS == "solaris"', {
               'link_settings': {
                 'libraries': [
                   '-ldl',
                 ],
               },
             }],
           ],
-        }, {  # else: OS=="win or OS == "mac" or OS == "ios" or OS == "android" or chromeos == 1
+        }, {  # else: use_pulseaudio==1
           'sources!': [
             'audio/pulse/audio_manager_pulse.cc',
             'audio/pulse/audio_manager_pulse.h',
             'audio/pulse/pulse_input.cc',
             'audio/pulse/pulse_input.h',
             'audio/pulse/pulse_output.cc',
             'audio/pulse/pulse_output.h',
             'audio/pulse/pulse_util.cc',
             'audio/pulse/pulse_util.h',
           ],
@@ skipping 911 matching lines @@
           ],
           'sources': [
             'base/simd/sinc_resampler_sse.cc',
             'base/simd/vector_math_sse.cc',
           ],
         }, # end of target media_sse
       ],
     }],
   ],
 }