Fix bug where custom cursors would disappear when screen was rotated for ozone based platforms. This was caused by commit cd0a8ae72380dc461eea58084325d9d981942192. The change modified the cursor SkBitmap to always be in unpremultiplied alpha format. However, the SkCanvas::drawBitmap() operation fails silently if the SkBitmap is in unpremultiplied format and the ui::ScaleAndRotateCursorBitmapAndHotpoint() function relies on SkCanvas::drawBitmap() to rotate the cursor. This fails and the cursor disappears.
This fix temporarily converts the cursor bitmap back to premultiplied alpha before rotating. It also adds a DCHECK to SkBitmapOperations::Rotate() to document the alpha type requirement.
BUG=533748
Review URL: https://codereview.chromium.org/1514723003
Cr-Commit-Position: refs/heads/master@{#366423}
2 files changed
