Combine match methods on StyleResolver.

Combine match methods on StyleResolver.

We can combine matchAuthorRulesForShadowHost into
matchAuthorRules, and also combine the two matchUARules
methods.

collectScopedResolversForHostedShadowTrees and the Vector
of ScopedStyleResolvers was also not needed. Sky can only
ever have two resolvers, the one for your scope, and the
one for your host rules.

R=ojan@chromium.org

Committed: https://chromium.googlesource.com/external/mojo/+/11781634cabe9fd48091d88d021a3c35e387848e

[esprehn, 2015-01-07 20:26:16]

esprehn@chromium.org changed reviewers:
+ ojan@chromium.org

[ojan, 2015-01-07 23:29:22]

lgtm

[esprehn, 2015-01-08 18:17:08]

Committed patchset #1 (id:1) manually as
11781634cabe9fd48091d88d021a3c35e387848e (presubmit successful).