Remove flag aliases for parallel recompilation.

src/flag-definitions.h

 // 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 314 matching lines @@
 
 DEFINE_bool(concurrent_recompilation, true,
             "optimizing hot functions asynchronously on a separate thread")
 DEFINE_bool(trace_concurrent_recompilation, false,
             "track concurrent recompilation")
 DEFINE_int(concurrent_recompilation_queue_length, 8,
            "the length of the concurrent compilation queue")
 DEFINE_int(concurrent_recompilation_delay, 0,
            "artificial compilation delay in ms")
 
-// TODO(yangguo): to ease transitioning to the new naming scheme, we keep
-//                the old flags for now as aliases.  Remove soon.
-DEFINE_ALIAS_bool(parallel_recompilation, concurrent_recompilation)
-DEFINE_ALIAS_bool(trace_parallel_recompilation, trace_concurrent_recompilation)
-DEFINE_ALIAS_int(parallel_recompilation_queue_length,
-                 concurrent_recompilation_queue_length)
-DEFINE_ALIAS_int(parallel_recompilation_delay, concurrent_recompilation_delay)
-
-
 DEFINE_bool(omit_map_checks_for_leaf_maps, true,
             "do not emit check maps for constant values that have a leaf map, "
             "deoptimize the optimized code if the layout of the maps changes.")
 
 // Experimental profiler changes.
 DEFINE_bool(experimental_profiler, true, "enable all profiler experiments")
 DEFINE_bool(watch_ic_patching, false, "profiler considers IC stability")
 DEFINE_int(frame_count, 1, "number of stack frames inspected by the profiler")
 DEFINE_bool(self_optimization, false,
             "primitive functions trigger their own optimization")
@@ skipping 506 matching lines @@
 #undef DEFINE_ALIAS_int
 #undef DEFINE_ALIAS_string
 #undef DEFINE_ALIAS_float
 #undef DEFINE_ALIAS_args
 
 #undef FLAG_MODE_DECLARE
 #undef FLAG_MODE_DEFINE
 #undef FLAG_MODE_DEFINE_DEFAULTS
 #undef FLAG_MODE_META
 #undef FLAG_MODE_DEFINE_IMPLICATIONS