Change error messages for octal escape sequences

src/parsing/scanner.h

Index: src/parsing/scanner.h
diff --git a/src/parsing/scanner.h b/src/parsing/scanner.h
index 3c397b3cb700abd05a412ff913b0ae49f9e9c3b7..329ca7d0de64263dad5e683bd05aeaf045600b37 100644
--- a/src/parsing/scanner.h
+++ b/src/parsing/scanner.h
@@ -274,7 +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(); }
+  void clear_octal_position() {
+    octal_pos_ = Location::invalid();
+    octal_message_ = MessageTemplate::kNone;
+  }
   // 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_;
@@ -282,6 +285,7 @@ class Scanner {
   void clear_decimal_with_leading_zero_position() {
     decimal_with_leading_zero_pos_ = Location::invalid();
   }
+  MessageTemplate::Template octal_message() const { return octal_message_; }
 
   // Returns the value of the last smi that was scanned.
   uint32_t smi_value() const { return current_.smi_value_; }
@@ -786,6 +790,7 @@ 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_;