Mark Mentovai 6e720f1421 Fix StringFileWriter::Seek().
The final range check needs to check that the value fits in a size_t,
because that’s what StringFileWriter uses for its offset_.

TEST=util_test StringFileWriter.SeekInvalid
R=rsesek@chromium.org

Review URL: https://codereview.chromium.org/434103003
2014-08-01 13:30:27 -04:00
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