Move microtask queueing logic from JavaScript to C++

tools/generate-runtime-tests.py

 #!/usr/bin/env python
 # Copyright 2014 the V8 project authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import itertools
 import multiprocessing
 import optparse
 import os
 import random
@@ skipping 14 matching lines @@
 FUNCTIONEND = "}\n"
 
 WORKSPACE = os.path.abspath(os.path.join(os.path.dirname(sys.argv[0]), ".."))
 BASEPATH = os.path.join(WORKSPACE, "test", "mjsunit", "runtime-gen")
 THIS_SCRIPT = os.path.relpath(sys.argv[0])
 
 # Counts of functions in each detection state. These are used to assert
 # that the parser doesn't bit-rot. Change the values as needed when you add,
 # remove or change runtime functions, but make sure we don't lose our ability
 # to parse them!
-EXPECTED_FUNCTION_COUNT = 338
-EXPECTED_FUZZABLE_COUNT = 305
+EXPECTED_FUNCTION_COUNT = 337
+EXPECTED_FUZZABLE_COUNT = 304
 EXPECTED_CCTEST_COUNT = 6
 EXPECTED_UNKNOWN_COUNT = 5
 
 
 # Don't call these at all.
 BLACKLISTED = [
   "Abort",  # Kills the process.
   "AbortJS",  # Kills the process.
   "CompileForOnStackReplacement",  # Riddled with ASSERTs.
   "IS_VAR",  # Not implemented in the runtime.
@@ skipping 1075 matching lines @@
       for i in range(len(processes)):
         processes[i].join()
     except KeyboardInterrupt:
       stop_running.set()
       for i in range(len(processes)):
         processes[i].join()
     return 0
 
 if __name__ == "__main__":
   sys.exit(Main())