A decimal integer literal with a leading 0 is now an error in strict mode.

src/parsing/parser.cc

Index: src/parsing/parser.cc
diff --git a/src/parsing/parser.cc b/src/parsing/parser.cc
index 51486c9b79445dafc91f5b26e6340c4334afb3f3..c0fbf55d0acf75103a658ca863ff90a371d96d10 100644
--- a/src/parsing/parser.cc
+++ b/src/parsing/parser.cc
@@ -791,8 +791,6 @@ FunctionLiteral* Parser::DoParseProgram(ParseInfo* info) {
 
     if (ok && is_strict(language_mode())) {
       CheckStrictOctalLiteral(beg_pos, scanner()->location().end_pos, &ok);
-      CheckDecimalLiteralWithLeadingZero(beg_pos,
-                                         scanner()->location().end_pos);
     }
     if (ok && is_sloppy(language_mode())) {
       // TODO(littledan): Function bindings on the global object that modify
@@ -2709,8 +2707,6 @@ FunctionLiteral* Parser::ParseFunctionLiteral(
     if (is_strict(language_mode)) {
       CheckStrictOctalLiteral(scope->start_position(), scope->end_position(),
                               CHECK_OK);
-      CheckDecimalLiteralWithLeadingZero(scope->start_position(),
-                                         scope->end_position());
     }
     CheckConflictingVarDeclarations(scope, CHECK_OK);
   }  // DiscardableZoneScope goes out of scope.