Introduce JIT code events dispatcher for the isolate.

src/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 452 matching lines @@
         'builtins.cc',
         'builtins.h',
         'cached-powers.cc',
         'cached-powers.h',
         'cancelable-task.cc',
         'cancelable-task.h',
         'char-predicates.cc',
         'char-predicates-inl.h',
         'char-predicates.h',
         'checks.h',
+        'code-events.h',
         'code-factory.cc',
         'code-factory.h',
         'code-stub-assembler.cc',
         'code-stub-assembler.h',
         'code-stubs.cc',
         'code-stubs.h',
         'code-stubs-hydrogen.cc',
         'codegen.cc',
         'codegen.h',
         'collector.h',
@@ skipping 1795 matching lines @@
         }],
         ['want_separate_host_toolset==1', {
           'toolsets': ['host'],
         }, {
           'toolsets': ['target'],
         }],
       ],
     },
   ],
 }