[PDF] Fix bug in graphic state comparison.
[PDF] Fix bug in graphic state comparison.

SkPDFGraphicState::GSCanonicalEntry::operator== was out of sync with SkPDFGraphicState::populateDict  leading to graphic state objects with the same value.

Review URL: http://codereview.appspot.com/4516043

git-svn-id: e8541e15acce502a64c929015570ad1648e548cd@1278 2bbb7eff-a529-9590-31e7-b0007b416f81

mrobinson/skia,mrobinson/skia,mrobinson/skia,Cue/skia,Cue/skia,metajack/skia,mrobinson/skia,Cue/skia,mrobinson/skia,metajack/skia,metajack/skia,metajack/skia,Cue/skia