Run Crankshaft on a separate thread.

tools/gyp/v8.gyp

 # 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 243 matching lines @@
             '../../src/circular-queue.h',
             '../../src/code-stubs.cc',
             '../../src/code-stubs.h',
             '../../src/code.h',
             '../../src/codegen.cc',
             '../../src/codegen.h',
             '../../src/compilation-cache.cc',
             '../../src/compilation-cache.h',
             '../../src/compiler.cc',
             '../../src/compiler.h',
+            '../../src/crankshaft-thread.cc',
+            '../../src/crankshaft-thread.h',
             '../../src/contexts.cc',
             '../../src/contexts.h',
             '../../src/conversions-inl.h',
             '../../src/conversions.cc',
             '../../src/conversions.h',
             '../../src/counters.cc',
             '../../src/counters.h',
             '../../src/cpu.h',
             '../../src/cpu-profiler-inl.h',
             '../../src/cpu-profiler.cc',
@@ skipping 712 matching lines @@
             }],
           ],
           'dependencies': [
             'v8'
           ],
         },
       ],
     }],
   ],
 }