Code: SystemLibrary* CrosLibrary::GetSystemLibrary() {
  return system_lib_.GetDefaultImpl(use_stub_impl_);
}

Commit Message: chromeos: Replace copy-and-pasted code with macros.

This replaces a bunch of duplicated-per-library cros
function definitions and comments.

BUG=none
TEST=built it

Review URL: http://codereview.chromium.org/6086007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@70070 0039d316-1c4b-4281-b951-d872f2087c98
CWE ID: CWE-189
SystemLibrary* CrosLibrary::GetSystemLibrary() {
