Platform cleanup in common/

Review URL: http://codereview.chromium.org/10988
Patch from Pawel Hajdan Jr.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@6506 0039d316-1c4b-4281-b951-d872f2087c98
5 files changed