Fix WebKit and Mozilla test expectations

test/mozilla/mozilla.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
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 59 matching lines @@
   # to test).
   # In particular, these two compare numbers to NaN with != in the current
   # version of the Mozilla tests. This is *fixed* in a later version.
   # The tests should be re-enabled when switching to a new version.
   'ecma_3/Date/15.9.3.2-1': [SKIP],
   'js1_2/function/Number': [SKIP],
 
   # TODO(2018): Temporarily allow timeout in debug mode.
   'js1_5/GC/regress-203278-2': [PASS, ['mode == debug', TIMEOUT, NO_VARIANTS, FAIL]],
 
+  # These tests use invalid LHS expressions in assignments.
+  'js1_5/Regress/regress-319391': [SKIP],
+  'js1_5/Regress/regress-350253': [SKIP],
+  'js1_5/Regress/regress-462292': [SKIP],
+  'js1_5/decompilation/regress-443071-01': [SKIP],
+
   ##################### SLOW TESTS #####################
 
   # This takes a long time to run (~100 seconds). It should only be run
   # by the really patient.
   'js1_5/GC/regress-324278': [SKIP],
 
   # This takes a long time to run because our indexOf operation is
   # pretty slow - it causes a lot of GCs; see issue
   # #926379. We could consider marking this SKIP because it takes a
   # while to run to completion.
@@ skipping 791 matching lines @@
   'js1_5/Regress/regress-416628': [SKIP],
   'js1_5/extensions/regress-371636': [SKIP],
   'ecma_3/RegExp/regress-330684': [SKIP],
   'ecma_3/RegExp/regress-307456': [SKIP],
   'js1_5/Regress/regress-303213': [SKIP],
   'js1_5/extensions/regress-330569': [SKIP],
   'js1_5/extensions/regress-351448': [SKIP],
   'js1_5/extensions/regress-336410-1': [SKIP],
 }],  # 'arch == a64 and simulator_run == True'
 ]