Aura: Fix scrollbar images on non-ChromeOS platforms
Aura: Fix scrollbar images on non-ChromeOS platforms

Need to include some resources files.

BUG=none
TEST=resize the chrome window until it shows scrollbars, they should paint
TBR=saintlou@chromium.org

Review URL: http://codereview.chromium.org/8304003

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@105548 0039d316-1c4b-4281-b951-d872f2087c98

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