Request to backport 4 changesets

[Jonathan Gibbons]

Joe,

I would like to backport the following block of langtools changesets 
from 7 to 6-open, b21

-- Jon


changeset:   91:748b44c7c40c
user:        jjg
date:        Thu Jul 10 16:50:38 2008 -0700
summary:     6724551: Use Queues instead of Lists to link compiler phases

changeset:   92:7ef9dea67bb9
user:        jjg
date:        Wed Jul 23 19:55:30 2008 -0700
summary:     6726015: JavaCompiler: replace desugarLater by compileStates

changeset:   93:410697a6c8ef
user:        mcimadamore
date:        Fri Aug 08 17:48:04 2008 +0100
summary:     6734819: Javac performs flows analysis on already 
translated classes

changeset:   94:daa4b9c734fb
tag:         tip
user:        jjg
date:        Wed Jun 16 16:23:27 2010 -0700
summary:     6956638: JavacTask.generate does not generate all required 
files