Bug 1575883 - Remove the code that created a couple threads at startup, in Gecko. r=kinetik

Differential Revision: https://phabricator.services.mozilla.com/D45688

--HG--
extra : moz-landing-system : lando

dom/ipc/ContentChild.cpp

@@ -1779,11 +1779,6 @@ mozilla::ipc::IPCResult ContentChild::RecvSetProcessSandbox(
     if (!Preferences::GetBool("media.cubeb.sandbox")) {
       Unused << CubebUtils::GetCubebContext();
     }
-#    if defined(XP_LINUX)
-    else {
-      CubebUtils::InitAudioThreads();
-    }
-#    endif
   }
 
   if (sandboxEnabled) {

dom/media/CubebUtils.cpp

@@ -81,9 +81,6 @@ extern void audioipc_server_stop(void*);
 // These functions are provided by audioipc-client crate
 extern int audioipc_client_init(cubeb**, const char*,
                                 const AudioIpcInitParams*);
-#ifdef XP_LINUX
-extern void audioipc_init_threads(const AudioIpcInitParams*);
-#endif
 }
 
 namespace mozilla {
@@ -445,18 +442,6 @@ ipc::FileDescriptor CreateAudioIPCConnection() {
 #endif
 }
 
-#if defined(XP_LINUX) && !defined(MOZ_WIDGET_ANDROID)
-void InitAudioThreads() {
-  AudioIpcInitParams initParams;
-  initParams.mPoolSize = sAudioIPCPoolSize;
-  initParams.mStackSize = sAudioIPCStackSize;
-  initParams.mThreadCreateCallback = [](const char* aName) {
-    PROFILER_REGISTER_THREAD(aName);
-  };
-  audioipc_init_threads(&initParams);
-}
-#endif
-
 cubeb* GetCubebContextUnlocked() {
   sMutex.AssertCurrentThreadOwns();
   if (sCubebForceNullContext) {

dom/media/CubebUtils.h

@@ -23,9 +23,6 @@ typedef cubeb_devid AudioDeviceID;
 // Initialize Audio Library. Some Audio backends require initializing the
 // library before using it.
 void InitLibrary();
-#  ifdef XP_LINUX
-void InitAudioThreads();
-#  endif
 
 // Shutdown Audio Library. Some Audio backends require shutting down the
 // library after using it.