Support customized display prefixes on API docs.

This adds support for a documentation_options property
to the JSON schema, with currently one subproperty, member_prefix.
When provided, the member_prefix string replaces the normally
hard-coded "chrome." prefix.

NOTRY=true

Review URL: https://codereview.chromium.org/25768002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@226815 0039d316-1c4b-4281-b951-d872f2087c98
Adding <a1.gomes@sisa.samsung.com> to AUTHORS file.

CLA is signed.

BUG=none

Review URL: https://codereview.chromium.org/25883002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@226816 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 226816