Roll Skia deps to r475.
Roll Skia deps to r475.

This picks up the following fix:

  skia: Always use aliased text when antialiasing is disabled.

  Otherwise, people who have antialiasing disabled end up with
  subpixel rendering if the subpixel setting happens to be set
  to something other than "none".  This change's interpretation
  of these overlapping settings seems to be consistent with
  GTK's and Firefox's.

BUG=28382
TEST=tested that aliased text is now drawn in the above case

Review URL: http://codereview.chromium.org/555035

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@36786 0039d316-1c4b-4281-b951-d872f2087c98

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