Test Codec::getFrameCount updates with more data

This mimics Chromium's
TestResumePartialDecodeAfterClearFrameBufferCache, which expects the
frame count to increase as more data comes in, even if the decoder is in
the middle of an incremental decode:

https://cs.chromium.org/chromium/src/third_party/blink/renderer/platform/image-decoders/image_decoder_test_helpers.cc?l=365&rcl=23787ba147959ebf4ad168c595d5ec87919fdbd2

Bug: skia:8235
Change-Id: Icc19ebea6d77f6b6fb62e3b2ff0c2ffb1ef0950d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/250476
Reviewed-by: Leon Scroggins <scroggo@google.com>
Commit-Queue: Leon Scroggins <scroggo@google.com>
1 file changed