GitLab

cherry-pick of https://code.google.com/p/skia/source/detail?r=10977

include/core/SkStream.h:
Update documentation to state that rewinding a stream at the beginning
should return true. This is important because our decoders fail if
rewind returns false, assuming that the stream is not at the beginning.

src/images/SkImageDecoder_libpng.cpp:
If rewind fails, call png_error.

src/images/SkImageDecoder_libwebp.cpp:
If rewind fails, report an error and return false.

src/images/SkImageRef.cpp:
If rewind fails report an error and return false.
FIXME: Need to handle flattening properly. Should I perhaps move
writeStream into SkOrderedWriteBuffer?

src/images/SkJpegUtility.cpp:
Report a jpeg error on failure to rewind.

BUG:8432093
Change-Id: Ie339cda0a9d31bf0abafc38f9c2c77726f23c6a6