Rename StaticType's kInstance to instance. This is more than just a noop: when ANGLE is rolled in Chromium it is tested by the Android Binary Size trybot. This trybot runs an analysis pass that checks that any new variable names "kSomthing" is in .rodata or .data.rel.ro because it helps keep the binary size (and the size of each new Chromium process) small on Android. The analysis picks up new usages of StaticType::Helpers::kInstance as a new constant varaible that isn't in .data.rel.ro or .rodata. My understanding is that kInstances isn't put in those segments because it contains a TType that has a "mutable" field so it would be incorrect to put the variable in a read-only segment. BUG=chromium:981610 Change-Id: I36e550e066206df3404619f1d012b183cbb72fe4 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1698202 Commit-Queue: Corentin Wallez <cwallez@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org>