Split NumberDictionary into a randomly seeded and an unseeded

Split NumberDictionary into a randomly seeded and an unseeded
version. We don't want to randomize the stub cache.

[Mads Ager (chromium), 2012-01-13 13:53:38]

I see nothing wrong with the change. The templates seem heavy to achieve the
typing benefit. Can we create two subclasses instead. Everything is shared
except for the hash functions. Then you get the typing benefit that way without
the templates and the duplication they lead to?

[Erik Corry, 2012-01-14 01:39:47]

On 2012/01/13 13:53:38, Mads Sig Ager wrote:
> I see nothing wrong with the change. The templates seem heavy to achieve the
> typing benefit. Can we create two subclasses instead. Everything is shared
> except for the hash functions. Then you get the typing benefit that way
without
> the templates and the duplication they lead to?

OK, here's a new code review with the other approach:

http://codereview.chromium.org/9174023

I agree the non-template version is prettier, though there is a little more
textual code duplication.