[graphite] Instantiate in CopyTextureToBufferTask::prepareResources.
AsyncReadPixels will use the CopyTextureToBufferTask and shouldn't need
to instantiate the textureProxy to create the task. This will make
CopyTextureToBufferTask match CopyTextureToTextureTask as well.
Bug: b/238756873
Change-Id: I3fa86a65232719451d4c081c82c5a6f2268d4620
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/587876
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
3 files changed
