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

src/parsing/scanner.h

Index: src/parsing/scanner.h
diff --git a/src/parsing/scanner.h b/src/parsing/scanner.h
index f3fc02558e714da475f811b4504e649897b5a993..09c94b9e77b5e80cac8fe6248e092cb1c4e4fc68 100644
--- a/src/parsing/scanner.h
+++ b/src/parsing/scanner.h
@@ -274,13 +274,10 @@ class Scanner {
 
   // Returns the location of the last seen octal literal.
   Location octal_position() const { return octal_pos_; }
-  void clear_octal_position() { octal_pos_ = Location::invalid(); }
-  // Returns the location of the last seen decimal literal with a leading zero.
-  Location decimal_with_leading_zero_position() const {
-    return decimal_with_leading_zero_pos_;
-  }
-  void clear_decimal_with_leading_zero_position() {
-    decimal_with_leading_zero_pos_ = Location::invalid();
+  MessageTemplate::Template octal_message() const { return octal_message_; }
+  void clear_octal_position() {
+    octal_pos_ = Location::invalid();
+    octal_message_ = MessageTemplate::kNone;
   }
 
   // Returns the value of the last smi that was scanned.
@@ -786,7 +783,7 @@ class Scanner {
 
   // Last-seen positions of potentially problematic tokens.
   Location octal_pos_;
-  Location decimal_with_leading_zero_pos_;
+  MessageTemplate::Template octal_message_;
 
   // One Unicode character look-ahead; c0_ < 0 at the end of the input.
   uc32 c0_;