Fix SkScalerContext_FreeType::generateFontMetrics.

SkScalerContext::generateFontMetrics implementations should not attempt
to take into account skew. This implementation should correctly handle
bitmap fonts as well.

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2165323002

Review-Url: https://codereview.chromium.org/2165323002
2 files changed