Add deopt fuzzer tool.

test/mjsunit/mjsunit.status

 # 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 224 matching lines @@
 # Requires bigger stack size in the Genesis and if stack size is increased,
 # the test requires too much time to run.  However, the problem test covers
 # should be platform-independent.
 regress/regress-1132: SKIP
 
 # Poor performance for NaCl V8 causes an assertion failure for this test.
 regress/regress-165637: SKIP
 
 # Skip long running test that times out in debug mode and goes OOM on NaCl.
 regress/regress-crbug-160010: SKIP
+
+##############################################################################
+[ $deopt_fuzzer == True ]
+
+# Skip tests that are not suitable for deoptimization fuzzing.
+assert-opt-and-deopt: SKIP
+never-optimize: SKIP
+regress/regress-2185-2: SKIP
+harmony/object-observe: SKIP
+readonly: SKIP
+array-feedback: SKIP
+
+# Deopt every n garbage collections collides with the deopt every n times flag.
+regress/regress-2653: SKIP
+
+# Issue 2795:
+array-store-and-grow: SKIP if $mode == debug
+
+