Only DirectUpdate was actually being used, so remove the dead
code. TextureImageCGL does't do anything over BasicTextureImage any more
so remove it too.
MozReview-Commit-ID: D7jpC9M7aTT
The bulk of this commit was generated by running:
run-clang-tidy.py \
-checks='-*,llvm-namespace-comment' \
-header-filter=^/.../mozilla-central/.* \
-fix
This introduces some infrastructure to start tracking the program state more carefully. Currently
it only tracks the program because UseProgram was showing up the most in profiles, but more
state could also be added as needed.