Revert drt-trampoline.py

tools/testing/drt-trampoline.py

Index: tools/testing/drt-trampoline.py
diff --git a/tools/testing/drt-trampoline.py b/tools/testing/drt-trampoline.py
index d9b90ff9f5173e947d4baf32e355483e163c5949..ac5b23d690af3de4017eebf27fa14da8ecb55ada 100644
--- a/tools/testing/drt-trampoline.py
+++ b/tools/testing/drt-trampoline.py
@@ -89,24 +89,13 @@ def main(argv):
     p.terminate()
     sys.exit(0)
 
-  def windows_exit_handler(signal):
-    p.terminate()
-    sys.exit(0)
-
-  if os.name == 'nt'
-    try:
-      import win32api
-      win32api.SetConsoleCtrlHandler(windows_exit_handler, True)
-    except ImportError:
-      raise Exception("pywin32 not installed")
-  else:
-    # SIGINT is Ctrl-C.
-    signal.signal(signal.SIGINT, signal_handler)
-    # SIGTERM is sent by test.dart when a process times out.
-    signal.signal(signal.SIGTERM, signal_handler)
-    output, error = p.communicate()
-    signal.signal(signal.SIGINT, signal.SIG_DFL)
-    signal.signal(signal.SIGTERM, signal.SIG_DFL)
+  # SIGINT is Ctrl-C.
+  signal.signal(signal.SIGINT, signal_handler)
+  # SIGTERM is sent by test.dart when a process times out.
+  signal.signal(signal.SIGTERM, signal_handler)
+  output, error = p.communicate()
+  signal.signal(signal.SIGINT, signal.SIG_DFL)
+  signal.signal(signal.SIGTERM, signal.SIG_DFL)
 
   if p.returncode != 0:
     raise Exception('Failed to run command. return code=%s' % p.returncode)