Add scoped stdio handles.

Since file_util uses stdio handles, we'll need this. Specifically, _ph
has a review out at the moment which requires them.

Review URL: http://codereview.chromium.org/11422


git-svn-id: svn://svn.chromium.org/chrome/trunk/src@5612 0039d316-1c4b-4281-b951-d872f2087c98
2 files changed