Rename "parallel recompilation" to "concurrent recompilation".

src/optimizing-compiler-thread.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 57 matching lines @@
     // We don't need a barrier since we have a data dependency right
     // after.
     Atomic32 current_length = NoBarrier_Load(&queue_length_);
 
     // This can be queried only from the execution thread.
     ASSERT(!IsOptimizerThread());
     // Since only the execution thread increments queue_length_ and
     // only one thread can run inside an Isolate at one time, a direct
     // doesn't introduce a race -- queue_length_ may decreased in
     // meantime, but not increased.
-    return (current_length < FLAG_parallel_recompilation_queue_length);
+    return (current_length < FLAG_concurrent_recompilation_queue_length);
   }
 
 #ifdef DEBUG
   bool IsOptimizerThread();
 #endif
 
   ~OptimizingCompilerThread() {
     delete install_mutex_;
     delete input_queue_semaphore_;
     delete stop_semaphore_;
@@ skipping 23 matching lines @@
   Mutex* install_mutex_;
   volatile AtomicWord stop_thread_;
   volatile Atomic32 queue_length_;
   int64_t time_spent_compiling_;
   int64_t time_spent_total_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OPTIMIZING_COMPILER_THREAD_H_