Use SystemDictionary::Builder and remove old factory methods

This is just a clean-up CL in favor of SystemDictionary::Builder.  No user-visible behavior change is intended.

BUG=none
TEST=unittest

git-svn-id: https://mozc.googlecode.com/svn/trunk@545 a6090854-d499-a067-5803-1114d4e51264
10 files changed
tree: fc6ffcf98422b171927b88c2b883bc0633afea6a
  1. src/