Merge revision 8089 to the 3.3 branch

src/json-parser.cc

Index: src/json-parser.cc
===================================================================
--- src/json-parser.cc	(revision 8087)
+++ src/json-parser.cc	(working copy)
@@ -453,6 +453,7 @@
         SeqTwoByteString::SizeFor(kInitialSpecialStringSize * allocation_count);
     int delta = allocated_string_size - string_size;
     Address start_filler_object = seq_two_byte->address() + string_size;
+    seq_two_byte->set_length(count);
     isolate()->heap()->CreateFillerObjectAt(start_filler_object, delta);
   }
   string_val_ = isolate()->factory()->NewConsString(ascii, seq_two_byte);