Remove weak_property from lib_sources.gypi, since it's already in lib_impl_sources.gypi Review URL: https://chromiumcodereview.appspot.com//10870111
Remove weak_property from lib_sources.gypi, since it's
already in lib_impl_sources.gypi
Review URL: https://chromiumcodereview.appspot.com//10870111

git-svn-id: c93d8a2297af3b929165606efe145742a534bc71@11419 260f80e4-7a28-3924-810f-c04153c831b5

dart-lang/sdk,dartino/dart-sdk,dartino/dart-sdk,dart-archive/dart-sdk,dartino/dart-sdk,dart-archive/dart-sdk,dart-lang/sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dartino/dart-sdk,dartino/dart-sdk,dartino/dart-sdk,dartino/dart-sdk,dart-archive/dart-sdk,dartino/dart-sdk,dart-lang/sdk,dart-archive/dart-sdk,dartino/dart-sdk,dart-archive/dart-sdk,dart-lang/sdk,dart-lang/sdk,dart-archive/dart-sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk