Backout changeset c8842b205236 to turn on the fix for bug 1423261 on all branches. a=backout

dom/ipc/ContentParent.cpp

@@ -3116,12 +3116,10 @@ ContentParent::KillHard(const char* aReason)
   mCalledKillHard = true;
   mForceKillTimer = nullptr;
 
-#ifdef NIGHTLY_BUILD
   MessageChannel* channel = GetIPCChannel();
   if (channel) {
     channel->SetInKillHardShutdown();
   }
-#endif
 
   // We're about to kill the child process associated with this content.
   // Something has gone wrong to get us here, so we generate a minidump