Revert of Wrap runtime.js in a function.

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 37 matching lines @@
     flags = (pattern.global ? 'g' : '')
         + (pattern.ignoreCase ? 'i' : '')
         + (pattern.multiline ? 'm' : '');
     if (harmony_unicode_regexps)
         flags += (pattern.unicode ? 'u' : '');
     if (harmony_regexps)
         flags += (pattern.sticky ? 'y' : '');
     pattern = pattern.source;
   }
 
-  pattern = IS_UNDEFINED(pattern) ? '' : $toString(pattern);
-  flags = IS_UNDEFINED(flags) ? '' : $toString(flags);
+  pattern = IS_UNDEFINED(pattern) ? '' : ToString(pattern);
+  flags = IS_UNDEFINED(flags) ? '' : ToString(flags);
 
   %RegExpInitializeAndCompile(object, pattern, flags);
 }
 
 
 function RegExpConstructor(pattern, flags) {
   if (%_IsConstructCall()) {
     DoConstructRegExp(this, pattern, flags);
   } else {
     // RegExp : Called as function; see ECMA-262, section 15.10.3.1.
@@ skipping 304 matching lines @@
 %FunctionSetLength(GlobalRegExp.prototype.compile, 1);
 
 // The properties `input` and `$_` are aliases for each other.  When this
 // value is set the value it is set to is coerced to a string.
 // Getter and setter for the input.
 var RegExpGetInput = function() {
   var regExpInput = LAST_INPUT($regexpLastMatchInfo);
   return IS_UNDEFINED(regExpInput) ? "" : regExpInput;
 };
 var RegExpSetInput = function(string) {
-  LAST_INPUT($regexpLastMatchInfo) = $toString(string);
+  LAST_INPUT($regexpLastMatchInfo) = ToString(string);
 };
 
 %OptimizeObjectForAddingMultipleProperties(GlobalRegExp, 22);
 %DefineAccessorPropertyUnchecked(GlobalRegExp, 'input', RegExpGetInput,
                                  RegExpSetInput, DONT_DELETE);
 %DefineAccessorPropertyUnchecked(GlobalRegExp, '$_', RegExpGetInput,
                                  RegExpSetInput, DONT_ENUM | DONT_DELETE);
 
 // The properties multiline and $* are aliases for each other.  When this
 // value is set in SpiderMonkey, the value it is set to is coerced to a
@@ skipping 41 matching lines @@
   %DefineAccessorPropertyUnchecked(GlobalRegExp, '$' + i,
                                    RegExpMakeCaptureGetter(i), NoOpSetter,
                                    DONT_DELETE);
 }
 %ToFastProperties(GlobalRegExp);
 
 $regexpExecNoTests = RegExpExecNoTests;
 $regexpExec = DoRegExpExec;
 
 })();