default SkPixelSerializer
Add SkImageEncoder::EncodeData(const SkPixmap&, ...) function.
Add SkImageEncoder::CreatePixelSerializer() to return a
PixelSerializer that calls into SkImageEncoder::EncodeData.
SkImage::encode() make use of SkImageEncoder::CreatePixelSerializer.
Committed: https://skia.googlesource.com/skia/+/
b0bd1516bff3f5afcbfd615e805867531657811b
Committed: https://skia.googlesource.com/skia/+/
808ce2886d732b1055f89c8fb0f1b11b47fcb0ce
Review URL: https://codereview.chromium.org/
1507123002