Cleanup of return types and names in factory.

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 395 matching lines @@
                              0.0);
     buffer.Dispose();
   }
   SkipWhitespace();
   return isolate()->factory()->NewNumber(number);
 }
 
 template <bool seq_ascii>
 Handle<String> JsonParser<seq_ascii>::SlowScanJsonString(int beg_pos) {
   // The currently scanned ascii characters.
-  Handle<String> ascii(isolate()->factory()->NewStrictSubString(source_,
+  Handle<String> ascii(isolate()->factory()->NewProperSubString(source_,
                                                                 beg_pos,
                                                                 position_));
   Handle<String> two_byte =
       isolate()->factory()->NewRawTwoByteString(kInitialSpecialStringSize,
                                                 NOT_TENURED);
   Handle<SeqTwoByteString> seq_two_byte =
       Handle<SeqTwoByteString>::cast(two_byte);
 
   int allocation_count = 1;
   int count = 0;
@@ skipping 98 matching lines @@
   }
   ASSERT_EQ('"', c0_);
   int end_pos = position_;
   // Advance past the last '"'.
   AdvanceSkipWhitespace();
   if (seq_ascii && is_symbol) {
     return isolate()->factory()->LookupAsciiSymbol(seq_source_,
                                                    beg_pos,
                                                    end_pos - beg_pos);
   } else {
-    return isolate()->factory()->NewStrictSubString(source_,
+    return isolate()->factory()->NewProperSubString(source_,
                                                     beg_pos,
                                                     end_pos);
   }
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_JSON_PARSER_H_