Compile ADM pulse code by default.

Pulse related code should still be disabled unless
WEBRTC_ENABLE_LINUX_PULSE is defined but it will always be
compiled.

Bug: None
Change-Id: If8a03aae445a8c73c3c347e275c5996368fe3088
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/171513
Reviewed-by: Henrik Andreassson <henrika@webrtc.org>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#30886}
diff --git a/modules/audio_device/BUILD.gn b/modules/audio_device/BUILD.gn
index 381c71f..2ce0ae2 100644
--- a/modules/audio_device/BUILD.gn
+++ b/modules/audio_device/BUILD.gn
@@ -277,16 +277,16 @@
           defines += [ "WEBRTC_USE_X11" ]
         }
         if (rtc_include_pulse_audio) {
-          sources += [
-            "linux/audio_device_pulse_linux.cc",
-            "linux/audio_device_pulse_linux.h",
-            "linux/audio_mixer_manager_pulse_linux.cc",
-            "linux/audio_mixer_manager_pulse_linux.h",
-            "linux/pulseaudiosymboltable_linux.cc",
-            "linux/pulseaudiosymboltable_linux.h",
-          ]
           defines += [ "WEBRTC_ENABLE_LINUX_PULSE" ]
         }
+        sources += [
+          "linux/audio_device_pulse_linux.cc",
+          "linux/audio_device_pulse_linux.h",
+          "linux/audio_mixer_manager_pulse_linux.cc",
+          "linux/audio_mixer_manager_pulse_linux.h",
+          "linux/pulseaudiosymboltable_linux.cc",
+          "linux/pulseaudiosymboltable_linux.h",
+        ]
       }
       if (is_mac) {
         sources += [