Rename "parallel recompilation" to "concurrent recompilation".

src/log.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 303 matching lines @@
       if (FLAG_log_internal_timer_events) LogTimerEvent(START);
     }
 
     ~TimerEventScope() {
       if (FLAG_log_internal_timer_events) LogTimerEvent(END);
     }
 
     void LogTimerEvent(StartEnd se);
 
     static const char* v8_recompile_synchronous;
-    static const char* v8_recompile_parallel;
+    static const char* v8_recompile_concurrent;
     static const char* v8_compile_full_code;
     static const char* v8_execute;
     static const char* v8_external;
 
    private:
     Isolate* isolate_;
     const char* name_;
   };
 
   // ==== Events logged by --log-regexp ====
@@ skipping 198 matching lines @@
                                  int length) = 0;
 
   NameBuffer* name_buffer_;
 };
 
 
 } }  // namespace v8::internal
 
 
 #endif  // V8_LOG_H_