GitLab

- Move link construction logic to scoped_clipboard_writer.cc
- Make callers use EscapeForHTML on the anchor text
- Make WriteHyperlink just write html, and not a bookmark as well (only affects one caller, which I updated)
- implement WriteBookmark for gtk

BUG=18034,18035

Review URL: http://codereview.chromium.org/194052

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@25833 0039d316-1c4b-4281-b951-d872f2087c98