Conditionally optimize precompile based on entry point.

This change yields a net savings in the Compiler command line entry point by
doing more optimization in the precompile phase.  The Precompile entry point
will continue to do minimal optimization.  In additional, -draftCompile will
prevent the optimization loop that happened during the precompile as well.

Review by: spoon

git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@5546 8db76d5a-ed1c-0410-87a9-c151d255dfc7
7 files changed