- Only looks for EXC_MASK_BAD_ACCESS, EXC_MASK_BAD_INSTRUCTION, and EXC_MASK_ARITHMETIC exceptions
- Adds try/catch blocks around "new" for bad_alloc
- Uses map.find() rather than map[] notation so as not to create extraneous objects
- Creates the exception watching thread as detached
r=mmentovai
git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@117 4c0a9323-5329-0410-9bdc-e9ce6186880e