Change AdditionalOptions to a list from a string. This fixes compilation errors
when building bench within chrome.

BUG=363
TEST=Build bench through a chrome checkout on windows
Review URL: http://codereview.appspot.com/5045042

git-svn-id: http://skia.googlecode.com/svn/trunk@2275 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed