views: Draw the menu separator line using FillRect instead of DrawLine.
views: Draw the menu separator line using FillRect instead of DrawLine.

BUG=100898
TEST=ash_shell, views examples window, open the menu example, click on it,
you should see the separator lines as before.
R=pkasting@chromium.org

Review URL: https://chromiumcodereview.appspot.com/9731007

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@127692 0039d316-1c4b-4281-b951-d872f2087c98

yitian134/chromium,ropik/chromium,ropik/chromium,gavinp/chromium,ropik/chromium,gavinp/chromium,gavinp/chromium,gavinp/chromium,yitian134/chromium,ropik/chromium,ropik/chromium,ropik/chromium,adobe/chromium,yitian134/chromium,yitian134/chromium,adobe/chromium,gavinp/chromium,gavinp/chromium,yitian134/chromium,yitian134/chromium,adobe/chromium,ropik/chromium,gavinp/chromium,adobe/chromium,adobe/chromium,ropik/chromium,yitian134/chromium,adobe/chromium,adobe/chromium,yitian134/chromium,adobe/chromium,adobe/chromium,gavinp/chromium,gavinp/chromium,yitian134/chromium,adobe/chromium,yitian134/chromium,ropik/chromium,gavinp/chromium,adobe/chromium