Drop NaCl support for posting stdout/stderr to JS.

ppapi/native_client/tests/nacl_browser/inbrowser_test_runner/test_runner_ppapi.c

Index: ppapi/native_client/tests/nacl_browser/inbrowser_test_runner/test_runner_ppapi.c
diff --git a/ppapi/native_client/tests/nacl_browser/inbrowser_test_runner/test_runner_ppapi.c b/ppapi/native_client/tests/nacl_browser/inbrowser_test_runner/test_runner_ppapi.c
index 0d57dfbf2337dc723591189e48c47c18f30d505b..ea61366ede191ceea701a8c96615e69a3e730452 100644
--- a/ppapi/native_client/tests/nacl_browser/inbrowser_test_runner/test_runner_ppapi.c
+++ b/ppapi/native_client/tests/nacl_browser/inbrowser_test_runner/test_runner_ppapi.c
@@ -121,13 +121,6 @@ static void PppMessagingHandleMessage(PP_Instance instance,
     result = g_browser_var->VarFromUtf8(kFailed, strlen(kFailed));
   }
 
-  /*
-   * This is a workaround for the problem that the messages sent by
-   * the "dev://postmessage" are unsynchronized.  The Javascript code
-   * looks for this message before finishing the test.
-   */
-  fprintf(stderr, "\nEND_OF_LOG\n");
-
   g_browser_messaging->PostMessage(instance, result);
 }