Run Crankshaft on a separate thread.

src/objects.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 5764 matching lines @@
   // Tells whether or not this function has been optimized.
   inline bool IsOptimized();
 
   // Tells whether or not this function can be optimized.
   inline bool IsOptimizable();
 
   // Mark this function for lazy recompilation. The function will be
   // recompiled the next time it is executed.
   void MarkForLazyRecompilation();
 
+  // Compile this function on the separate compiler thread.  Asserts
+  // FLAG_concurrrent_crankshaft
+  void CompileConcurrently();
+
   // Helpers to compile this function.  Returns true on success, false on
   // failure (e.g., stack overflow during compilation).
   static bool CompileLazy(Handle<JSFunction> function,
                           ClearExceptionFlag flag);
   static bool CompileOptimized(Handle<JSFunction> function,
                                int osr_ast_id,
                                ClearExceptionFlag flag);
 
   // Tells whether or not the function is already marked for lazy
   // recompilation.
@@ skipping 2852 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_