Fix advances for aliased text with DirectWrite.

The existing code assumes that GetGdiCompatibleGlyphMetrics transform
parameter acts the same as the GetGlyphOutlineW lpmat2 parameter.
However, it appears this is very much not true.

BUG=skia:6499

Change-Id: I88c762b27acd09cc746da4d6e2b901540876908a
Reviewed-on: https://skia-review.googlesource.com/13479
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
2 files changed