diff -r 000000000000 -r 6474c204b198 mfbt/double-conversion/README
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+http://code.google.com/p/double-conversion
+
+This project (double-conversion) provides binary-decimal and decimal-binary
+routines for IEEE doubles.
+
+The library consists of efficient conversion routines that have been extracted
+from the V8 JavaScript engine. The code has been refactored and improved so that
+it can be used more easily in other projects.
+
+There is extensive documentation in src/double-conversion.h. Other examples can
+be found in test/cctest/test-conversions.cc.