Remove OS(QNX) support.

Source/wtf/StackBounds.cpp

Index: Source/wtf/StackBounds.cpp
diff --git a/Source/wtf/StackBounds.cpp b/Source/wtf/StackBounds.cpp
index 806ea2c78642e393fa857d069ec990083c43e949..9c40ba1950c5170970df7c2fbeeaee65d4eecb96 100644
--- a/Source/wtf/StackBounds.cpp
+++ b/Source/wtf/StackBounds.cpp
@@ -35,15 +35,6 @@
 
 #include <thread.h>
 
-#elif OS(QNX)
-
-#include <errno.h>
-#include <fcntl.h>
-#include <pthread.h>
-#include <stdio.h>
-#include <string.h>
-#include <sys/procfs.h>
-
 #elif OS(UNIX)
 
 #include <pthread.h>
@@ -58,7 +49,7 @@ namespace WTF {
 // Bug 26276 - Need a mechanism to determine stack extent
 //
 // These platforms should now be working correctly:
-//     DARWIN, QNX, UNIX
+//     DARWIN, UNIX
 // These platforms are not:
 //     WINDOWS, SOLARIS, OPENBSD
 //
@@ -82,31 +73,6 @@ void StackBounds::initialize()
     m_bound = static_cast<char*>(m_origin) - pthread_get_stacksize_np(thread);
 }
 
-#elif OS(QNX)
-
-void StackBounds::initialize()
-{
-    void* stackBase = 0;
-    size_t stackSize = 0;
-
-    struct _debug_thread_info threadInfo;
-    memset(&threadInfo, 0, sizeof(threadInfo));
-    threadInfo.tid = pthread_self();
-    int fd = open("/proc/self", O_RDONLY);
-    if (fd == -1) {
-        LOG_ERROR("Unable to open /proc/self (errno: %d)", errno);
-        CRASH();
-    }
-    devctl(fd, DCMD_PROC_TIDSTATUS, &threadInfo, sizeof(threadInfo), 0);
-    close(fd);
-    stackBase = reinterpret_cast<void*>(threadInfo.stkbase);
-    stackSize = threadInfo.stksize;
-    ASSERT(stackBase);
-
-    m_bound = static_cast<char*>(stackBase) + 0x1000; // 4kb guard page
-    m_origin = static_cast<char*>(stackBase) + stackSize;
-}
-
 #elif OS(SOLARIS)
 
 void StackBounds::initialize()