Fixes pathological slowness in remote UI logger (GPE).

Before: all logging to remote UI occurred in a synchronous, blocking manner.

After: except for creating top-level loggers, all sub-branches and log events happen asynchronously and are flushed on a background thread.

http://gwt-code-reviews.appspot.com/550801/show
Review by: rdayal


git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@8242 8db76d5a-ed1c-0410-87a9-c151d255dfc7
6 files changed