GitLab

This change adds a "Learn More" link to the Spelling bubble so we can open the "Exploring Chrome's privacy features" page as our "Under the Hood" page does.

BUG=103840
TEST=right click on a misspelled word.

Review URL: http://codereview.chromium.org/8561024

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@110906 0039d316-1c4b-4281-b951-d872f2087c98