Issue #1751 -- Remove XP_MACOSX conditionals from the rest of the tree.

This also removes some PP abuse and takes file entries out of PP when no longer
needed without XP_MACOSX conditionals.

tools/profiler/tasktracer/GeckoTaskTracer.cpp

@@ -1,5 +1,4 @@
 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* vim:set ts=2 sw=2 sts=2 et cindent: */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
@@ -26,10 +25,6 @@
 #include <unistd.h>
 #include <sys/syscall.h>
 #define gettid() static_cast<pid_t>(syscall(SYS_gettid))
-#elif defined(XP_MACOSX)
-#include <unistd.h>
-#include <sys/syscall.h>
-#define gettid() static_cast<pid_t>(syscall(SYS_thread_selfid))
 #elif defined(LINUX)
 #include <sys/types.h>
 pid_t gettid();