Revert "Fix lots of variable shadowing in ANGLE" Caused WebGL CTS failures on the texture-npot test: https://www.khronos.org/registry/webgl/sdk/tests/conformance/textures/texture-npot.html This reverts commit c67e6e9fade44ef8938724e82db11db725e9c8e5. Change-Id: I089e99859231e0d657084ac3647257c650a9da92 Reviewed-on: https://chromium-review.googlesource.com/243041 Reviewed-by: Geoff Lang <geofflang@chromium.org> Tested-by: Geoff Lang <geofflang@chromium.org>