This directory contains Python code used for interacting with the Skia Gold image diff service. It is used by multiple test harnesses, e.g. `//build/android/test_runner.py` and `//content/test/gpu/run_gpu_integration_test.py`. A place such as `//testing/` would likely be a better location, but causes issues with V8 since it imports `//build/` but not all of Chromium src.