Barcode utility functions

These utility functions allow you to encode a binary number into a VideoFrame,
this will be used in our testing to detect dropped frame and audio sync issues
in our tab capture tests.

Review URL: https://codereview.chromium.org/179923003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@256240 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 256240