Add support for //# sourceURL similar to deprecated //@ sourceURL one.

src/messages.js

 // Copyright 2012 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 525 matching lines @@
 function ScriptLineCount() {
   // Return number of source lines.
   return this.line_ends.length;
 }
 
 
 /**
  * If sourceURL comment is available and script starts at zero returns sourceURL
  * comment contents. Otherwise, script name is returned. See
  * http://fbug.googlecode.com/svn/branches/firebug1.1/docs/ReleaseNotes_1.1.txt
- * for details on using //@ sourceURL comment to identify scritps that don't
- * have name.
+ * and Source Map Revision 3 proposal for details on using //# sourceURL and
+ * deprecated //@ sourceURL comment to identify scripts that don't have name.
  *
- * @return {?string} script name if present, value for //@ sourceURL comment
- * otherwise.
+ * @return {?string} script name if present, value for //# sourceURL or
+ * deprecated //@ sourceURL comment otherwise.
  */
 function ScriptNameOrSourceURL() {
   if (this.line_offset > 0 || this.column_offset > 0) {
     return this.name;
   }
 
   // The result is cached as on long scripts it takes noticable time to search
   // for the sourceURL.
   if (this.hasCachedNameOrSourceURL) {
     return this.cachedNameOrSourceURL;
   }
   this.hasCachedNameOrSourceURL = true;
 
   // TODO(608): the spaces in a regexp below had to be escaped as \040
   // because this file is being processed by js2c whose handling of spaces
   // in regexps is broken. Also, ['"] are excluded from allowed URLs to
   // avoid matches against sources that invoke evals with sourceURL.
   // A better solution would be to detect these special comments in
   // the scanner/parser.
   var source = ToString(this.source);
   var sourceUrlPos = %StringIndexOf(source, "sourceURL=", 0);
   this.cachedNameOrSourceURL = this.name;
   if (sourceUrlPos > 4) {
     var sourceUrlPattern =
-        /\/\/@[\040\t]sourceURL=[\040\t]*([^\s\'\"]*)[\040\t]*$/gm;
+        /\/\/[#@][\040\t]sourceURL=[\040\t]*([^\s\'\"]*)[\040\t]*$/gm;
     // Don't reuse lastMatchInfo here, so we create a new array with room
     // for four captures (array with length one longer than the index
     // of the fourth capture, where the numbering is zero-based).
     var matchInfo = new InternalArray(CAPTURE(3) + 1);
     var match =
         %_RegExpExec(sourceUrlPattern, source, sourceUrlPos - 4, matchInfo);
     if (match) {
       this.cachedNameOrSourceURL =
           %_SubString(source, matchInfo[CAPTURE(2)], matchInfo[CAPTURE(3)]);
     }
@@ skipping 739 matching lines @@
     %SetOverflowedStackTrace(this, void 0);
   }
 
   %DefineOrRedefineAccessorProperty(
       boilerplate, 'stack', getter, setter, DONT_ENUM);
 
   return boilerplate;
 }
 
 var kStackOverflowBoilerplate = SetUpStackOverflowBoilerplate();