Code cleanup forCompositeTreeLogger, AbstractTreeLogger

- Removes access to AbstractTreeLogger.indexWithinMyParent
- CompositeTreeLogger now extends TreeLogger directly and composes TreeLoggers, rather than AbstractTreeLogger

Suggested by: mmendez
Review by: jat



git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@6514 8db76d5a-ed1c-0410-87a9-c151d255dfc7
7 files changed