Disable ParserSync test for now, it takes waaaaay too long.

test/cctest/test-parsing.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1491 matching lines @@
     }
     for (size_t flag_index = 0; flag_index < always_false_flags_length;
          ++flag_index) {
       flags.Remove(always_false_flags[flag_index]);
     }
     TestParserSyncWithFlags(str, flags, result);
   }
 }
 
 
-TEST(ParserSync) {
+// TODO(marja) This needs to be turned into a fuzzing test, trying all those
+// combinations below takes at least 2 orders of magnitude too long.
+DISABLED_TEST(ParserSync) {
   const char* context_data[][2] = {
     { "", "" },
     { "{", "}" },
     { "if (true) ", " else {}" },
     { "if (true) {} else ", "" },
     { "if (true) ", "" },
     { "do ", " while (false)" },
     { "while (false) ", "" },
     { "for (;;) ", "" },
     { "with ({})", "" },
@@ skipping 2979 matching lines @@
                     always_false_flags, arraysize(always_false_flags));
 
   const char* good_data[] = {
     "let = 1;",
     "for(let = 1;;){}",
     NULL};
   RunParserSyncTest(context_data, good_data, kSuccess, NULL, 0,
                     always_true_flags, arraysize(always_true_flags),
                     always_false_flags, arraysize(always_false_flags));
 }