Fix assignment of non-copyable.

see http://connect.microsoft.com/VisualStudio/feedback/details/552586/inherting-noncopyable-base-allows-equal-sign-initialization


git-svn-id: http://skia.googlecode.com/svn/trunk@4008 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed