linux_aura: Fix button height on dialog buttons in GTK theme mode.

DialogClientView was overriding the default height of label buttons to
be 0, which confused some of the views sizing code. Set the width
independently of the height.

BUG=339247
R=msw@chromium.org, sadrul@chromium.org

Review URL: https://codereview.chromium.org/149243008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@248570 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 248570
rAc: fix some validation issues

1) hide bubble after fixing a missing month or year
2) CVC validity should be based on card type best guess
3) cross-field validation shouldn't override single-field validation, but fields that are validly individually shouldn't skip cross-field validation just because their partner field is invalid (necessary for \#2)

BUG=336998

Review URL: https://codereview.chromium.org/141843005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@248571 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 248571