Fixed error introduced in r12761.

src/json-parser.h

 // Copyright 2011 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 382 matching lines @@
     Advance();
     negative = true;
   }
   if (c0_ == '0') {
     Advance();
     // Prefix zero is only allowed if it's the only digit before
     // a decimal point or exponent.
     if ('0' <= c0_ && c0_ <= '9') return ReportUnexpectedCharacter();
   } else {
     int i = 0;
+    int digits = 0;
     if (c0_ < '1' || c0_ > '9') return ReportUnexpectedCharacter();
     do {
       i = i * 10 + c0_ - '0';
+      digits++;
       Advance();
-    } while (c0_ >= '0' && c0_ <= '9' && i <= (kMaxInt - 9) / 10);
-    if (c0_ != '.' && c0_ != 'e' && c0_ != 'E') {
+    } while (c0_ >= '0' && c0_ <= '9');
+    if (c0_ != '.' && c0_ != 'e' && c0_ != 'E' && digits < 10) {
       SkipWhitespace();
       return Handle<Smi>(Smi::FromInt((negative ? -i : i)), isolate());
     }
   }
   if (c0_ == '.') {
     Advance();
     if (c0_ < '0' || c0_ > '9') return ReportUnexpectedCharacter();
     do {
       Advance();
     } while (c0_ >= '0' && c0_ <= '9');
@@ skipping 257 matching lines @@
   }
   ASSERT_EQ('"', c0_);
   // Advance past the last '"'.
   AdvanceSkipWhitespace();
   return result;
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_JSON_PARSER_H_