Production AppEngine doesn't emit the proper mimetype for SVG automaticallly, requiring handling it in app code. To fix this bug, I just converted the CC logo to PNG.

BUG=330040
NOTRY=true

Review URL: https://codereview.chromium.org/119983002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243961 0039d316-1c4b-4281-b951-d872f2087c98