GitLab

This CL changes how omnibox popup results are truncated. Previously content
text would be truncated at 70% which might leave empty space if the description
was short. I've made the following changes to the truncation code:
  - move the truncation logic to the button cell
  - have the content text fill up unused space when truncating
  - use a fade effect to truncate instead of ellipses

BUG=9977, 252988

Review URL: https://chromiumcodereview.appspot.com/17774002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@217109 0039d316-1c4b-4281-b951-d872f2087c98