Fixing SkDeferredCanvas to not consider paint as opaque when xfermode source coeff depends
on destination pixel value

TEST=DeferredCanvas unit test
BUG=http://code.google.com/p/chromium/issues/detail?id=154748



git-svn-id: http://skia.googlecode.com/svn/trunk@5907 2bbb7eff-a529-9590-31e7-b0007b416f81
2 files changed