[regexp] Let RegExp.prototype.compile return this

test/test262/test262.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 342 matching lines @@
   # https://bugs.chromium.org/p/v8/issues/detail?id=5135
   'annexB/language/eval-code/direct/func-block-decl-eval-func-block-scoping': [FAIL],
   'annexB/language/eval-code/direct/func-if-decl-else-decl-a-eval-func-block-scoping': [FAIL],
   'annexB/language/eval-code/direct/func-if-decl-else-decl-b-eval-func-block-scoping': [FAIL],
   'annexB/language/eval-code/direct/func-if-decl-else-stmt-eval-func-block-scoping': [FAIL],
   'annexB/language/eval-code/direct/func-if-decl-no-else-eval-func-block-scoping': [FAIL],
   'annexB/language/eval-code/direct/func-if-stmt-else-decl-eval-func-block-scoping': [FAIL],
   'annexB/language/eval-code/direct/func-switch-case-eval-func-block-scoping': [FAIL],
   'annexB/language/eval-code/direct/func-switch-dflt-eval-func-block-scoping': [FAIL],
 
-  # https://bugs.chromium.org/p/v8/issues/detail?id=5137
-  'annexB/built-ins/RegExp/prototype/compile/flags-undefined': [FAIL],
-  'annexB/built-ins/RegExp/prototype/compile/pattern-regexp-distinct': [FAIL],
-  'annexB/built-ins/RegExp/prototype/compile/pattern-regexp-same': [FAIL],
-  'annexB/built-ins/RegExp/prototype/compile/pattern-undefined': [FAIL],
-
   # https://bugs.chromium.org/p/v8/issues/detail?id=5139
   'annexB/built-ins/Date/prototype/setYear/time-clip': [FAIL],
   'annexB/built-ins/Date/prototype/setYear/year-number-relative': [FAIL],
 
   # https://bugs.chromium.org/p/v8/issues/detail?id=5155
   'language/white-space/mongolian-vowel-separator': [FAIL],
   'language/white-space/mongolian-vowel-separator-eval': [FAIL],
   'built-ins/RegExp/S15.10.2.12_A2_T1': [FAIL],
   'built-ins/RegExp/S15.10.2.12_A1_T1': [FAIL],
   'built-ins/parseFloat/S15.1.2.3_A2_T10_U180E': [FAIL],
@@ skipping 220 matching lines @@
 
 ['variant == asm_wasm', {
   '*': [SKIP],
 }],  # variant == asm_wasm
 
 ['variant == wasm_traps', {
   '*': [SKIP],
 }],  # variant == wasm_traps
 
 ]