Introduce per-isolate assert scopes and API to guard JS execution.

test/cctest/cctest.status

 # Copyright 2011 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
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@@ skipping 28 matching lines @@
   'test-api/InitializeAndDisposeMultiple': [SKIP],
 
   # These tests always fail.  They are here to test test.py.  If
   # they don't fail then test.py has failed.
   'test-serialize/TestThatAlwaysFails': [FAIL],
   'test-serialize/DependentTestThatAlwaysFails': [FAIL],
 
   # This test always fails.  It tests that LiveEdit causes abort when turned off.
   'test-debug/LiveEditDisabled': [FAIL],
 
+  # This test always fails.  It tests that DisallowJavascriptExecutionScope
+  # works as intended.
+  'test-api/DisallowJavascriptExecutionScope': [FAIL],
+
   # TODO(gc): Temporarily disabled in the GC branch.
   'test-log/EquivalenceOfLoggingAndTraversal': [PASS, FAIL],
 
   # We do not yet shrink weak maps after they have been emptied by the GC
   'test-weakmaps/Shrinking': [FAIL],
   'test-weaksets/WeakSet_Shrinking': [FAIL],
 
   # Boot up memory use is bloated in debug mode.
   'test-mark-compact/BootUpMemoryUse': [PASS, PASS, ['mode == debug', FAIL]],
 
@@ skipping 160 matching lines @@
   # Fails since 16322 (new test).
   'test-code-stubs-arm/ConvertDToI': [SKIP],
 
   # BUG(2998).
   'test-macro-assembler-arm/LoadAndStoreWithRepresentation': [SKIP],
 
   # BUG(3150).
   'test-api/PreCompileInvalidPreparseDataError': [SKIP],
 }],  # 'arch == nacl_ia32 or arch == nacl_x64'
 ]