Fixing focus issue after tab crash.

BUG=276609
R=sky,ananta

Review URL: https://codereview.chromium.org/23618033

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@229919 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 229919