[Author: dmaclach]
[Author: dmaclach]

GTM_PROPERTY Macro defined to make working with
willChangeValueForKey: and didChangeValueForKey: safer.

R=thomasvl
DELTA=13  (13 added, 0 deleted, 0 changed)

git-svn-id: de279663232b6350d3cffc59c8efba27ad613299@401 7dc7ac4e-7543-0410-b95c-c1676fc8e2a3

sbentzen/Google-Toolbox-for-Mac,Chilledheart/google-toolbox-for-mac,innerfence/google-toolbox-for-mac,lxcid/google-toolbox-for-mac,senpo/google-toolbox-for-mac,Chilledheart/google-toolbox-for-mac,adinardi/google-toolbox-for-mac,pepperpop/google-toolbox-for-mac,senpo/google-toolbox-for-mac,Yelp/google-toolbox-for-mac,kazupon/Google-Toolbox-for-Mac,pepperpop/google-toolbox-for-mac,chakrit/gtm,chakrit/gtm,sbentzen/Google-Toolbox-for-Mac,pepperpop/google-toolbox-for-mac,sbentzen/Google-Toolbox-for-Mac,innerfence/google-toolbox-for-mac,Yelp/google-toolbox-for-mac,aseehra/google-toolbox-for-mac,Chilledheart/google-toolbox-for-mac,lxcid/google-toolbox-for-mac,glebd/google-toolbox-for-mac,adinardi/google-toolbox-for-mac,senpo/google-toolbox-for-mac,kazupon/Google-Toolbox-for-Mac,aseehra/google-toolbox-for-mac,adinardi/google-toolbox-for-mac,yood/google-toolbox-for-mac,yood/google-toolbox-for-mac,chakrit/gtm,innerfence/google-toolbox-for-mac,glebd/google-toolbox-for-mac,lxcid/google-toolbox-for-mac,Yelp/google-toolbox-for-mac