Fix the Facebook sidebar....

Fix the Facebook sidebar.

This is actually just a replica of the following patch (internal Google URL):
   http://go/facebook-skia-patch

Apparently the changes made by yzshen@google.com were not upstreamed to Skia.

In the most recent skia update (r7308), these changes were dropped.

I've tested the changes locally, and it fixes Facebook. However, it could 
possibly break layout tests.

BUG=5564
R= brettw
TEST= I'd kill for one.

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=9836