Remove BLACKLIST from check-name-clashes.py, it's wrong nowadays.

src/regexp.js

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 var $regexpExec;
 var $regexpExecNoTests;
 var $regexpLastMatchInfo;
 var $regexpLastMatchInfoOverride;
 var harmony_regexps = false;
 var harmony_unicode_regexps = false;
@@ skipping 127 matching lines @@
   var matchInfo = %_RegExpExec(regexp, string, start, $regexpLastMatchInfo);
   if (matchInfo !== null) {
     $regexpLastMatchInfoOverride = null;
     RETURN_NEW_RESULT_FROM_MATCH_INFO(matchInfo, string);
   }
   regexp.lastIndex = 0;
   return null;
 }
 
 
-function RegExpExec(string) {
+function RegExpExecJS(string) {
   if (!IS_REGEXP(this)) {
     throw MakeTypeError('incompatible_method_receiver',
                         ['RegExp.prototype.exec', this]);
   }
 
   string = TO_STRING_INLINE(string);
   var lastIndex = this.lastIndex;
 
   // Conversion is required by the ES5 specification (RegExp.prototype.exec
   // algorithm, step 5) even if the value is discarded for non-global RegExps.
@@ skipping 199 matching lines @@
 }
 
 // -------------------------------------------------------------------
 
 %FunctionSetInstanceClassName(GlobalRegExp, 'RegExp');
 %AddNamedProperty(
     GlobalRegExp.prototype, 'constructor', GlobalRegExp, DONT_ENUM);
 %SetCode(GlobalRegExp, RegExpConstructor);
 
 InstallFunctions(GlobalRegExp.prototype, DONT_ENUM, GlobalArray(
-  "exec", RegExpExec,
+  "exec", RegExpExecJS,
   "test", RegExpTest,
   "toString", RegExpToString,
   "compile", RegExpCompileJS
 ));
 
 // The length of compile is 1 in SpiderMonkey.
 %FunctionSetLength(GlobalRegExp.prototype.compile, 1);
 
 // The properties `input` and `$_` are aliases for each other.  When this
 // value is set the value it is set to is coerced to a string.
@@ skipping 58 matching lines @@
   %DefineAccessorPropertyUnchecked(GlobalRegExp, '$' + i,
                                    RegExpMakeCaptureGetter(i), NoOpSetter,
                                    DONT_DELETE);
 }
 %ToFastProperties(GlobalRegExp);
 
 $regexpExecNoTests = RegExpExecNoTests;
 $regexpExec = DoRegExpExec;
 
 })();