Handlify LookupSingleCharacterStringFromCode.

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 239 matching lines @@
       case '9':
         message = "unexpected_token_number";
         array = factory->NewJSArray(0);
         break;
       case '"':
         message = "unexpected_token_string";
         array = factory->NewJSArray(0);
         break;
       default:
         message = "unexpected_token";
-        Handle<Object> name =
-            LookupSingleCharacterStringFromCode(isolate_, c0_);
+        Handle<Object> name = factory->LookupSingleCharacterStringFromCode(c0_);
         Handle<FixedArray> element = factory->NewFixedArray(1);
         element->set(0, *name);
         array = factory->NewJSArrayWithElements(element);
         break;
     }
 
     MessageLocation location(factory->NewScript(source_),
                              position_,
                              position_ + 1);
     Handle<Object> error = factory->NewSyntaxError(message, array);
@@ skipping 526 matching lines @@
 
   ASSERT_EQ('"', c0_);
   // Advance past the last '"'.
   AdvanceSkipWhitespace();
   return result;
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_JSON_PARSER_H_