There are two issues with processing the images multiple times:

- The graph trips up because on the first addWriteDependency, the
  current writer pointer of the image will be set to the recorder, and
  which on the next addWriteDependency creates a self-dependency.
- We transition the layout of the whole of the image, so doing that
  multiple times is inefficient.

Bug: angleproject:4312
Change-Id: Ibae72e8698edf5db97139f48d68624d3e9a1d5db
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2022355Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Ian Elliott <ianelliott@google.com>
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>