Fix run_ppapi_ppp_input_event_browser_test and re-enable it.

chrome/test/nacl_test_injection/buildbot_nacl_integration.py

Index: chrome/test/nacl_test_injection/buildbot_nacl_integration.py
diff --git a/chrome/test/nacl_test_injection/buildbot_nacl_integration.py b/chrome/test/nacl_test_injection/buildbot_nacl_integration.py
index f8dbf1540592851fe5df482c60ce281e2dbf5686..066a92392f9285cbc815cfc25d685f351ac634af 100755
--- a/chrome/test/nacl_test_injection/buildbot_nacl_integration.py
+++ b/chrome/test/nacl_test_injection/buildbot_nacl_integration.py
@@ -82,12 +82,6 @@ def Main(args):
   if sys.platform in ('win32', 'cygwin'):
     tests_to_disable.append('run_ppapi_ppp_input_event_browser_test')
 
-  # Webkit seems to be slightly buggy and breaking this test.  Disabled so
-  # Webkit's DEPS can be rolled.
-  # See: http://crbug.com/143973
-  # TODO(ncbray) re-enable.
-  tests_to_disable.append('run_ppapi_ppp_input_event_browser_test')
-
   script_dir = os.path.dirname(os.path.abspath(__file__))
   test_dir = os.path.dirname(script_dir)
   chrome_dir = os.path.dirname(test_dir)