Release 19 includes several bug fixes and API updates [1]. - Remove "unchecked" warning suppressions that are no longer necessary. - Replace calls to deprecated Futures.transform() with new Futures.transformAsync(). - Use CharMatcher's static factory methods instead of constants that will later be deprecated. [1] https://github.com/google/guava/wiki/Release19 Change-Id: I512ddc6ccf7ebaac0c16557d3b0d62ee1394de37