Create a watchlist for libwebp

BUG=
R=jzern@chromium.org

Review URL: https://codereview.chromium.org/126863002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243433 0039d316-1c4b-4281-b951-d872f2087c98
[Views] Hook up the "Remove" button in the collected cookies dialog.

BUG=168996
TEST=Go to google.com, click on the lock icon, click on "Show cookies", and remove site data from the Allowed pane.

Review URL: https://codereview.chromium.org/126123003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243434 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 243434