Fix global_constructors, exit_time_destructors in audio device pulse.

Bug: webrtc:9693
Change-Id: I05498473be8a86756d65d0b9000d626c966d4ed3
Reviewed-on: https://webrtc-review.googlesource.com/100422
Reviewed-by: Henrik Andreassson <henrika@webrtc.org>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24865}

modules/audio_device/linux/audio_device_alsa_linux.h

@@ -28,13 +28,6 @@
 typedef webrtc::adm_linux_alsa::AlsaSymbolTable WebRTCAlsaSymbolTable;
 WebRTCAlsaSymbolTable* GetAlsaSymbolTable();
 
-// Accesses ALSA functions through our late-binding symbol table instead of
-// directly. This way we don't have to link to libasound, which means our binary
-// will work on systems that don't have it.
-#define LATE(sym)                                                            \
-  LATESYM_GET(webrtc::adm_linux_alsa::AlsaSymbolTable, GetAlsaSymbolTable(), \
-              sym)
-
 namespace webrtc {
 class EventWrapper;