Commit Briefs
silence more warnings
R=rsc http://codereview.appspot.com/6744056
fix gcc 4.7 warnings (thanks Tuncer Ayaz)
R=rsc http://codereview.appspot.com/6744053
R=rsc http://codereview.appspot.com/6744056
R=rsc http://codereview.appspot.com/6744053