Clean up PlatformMethods enum allocation EGL_PLATFORM_ANGLE_PLATFORM_METHODS_ANGLEX was allocated to 0x3482 without reserving an enum in the ANGLE drive. This value was later used for EGL_POWER_PREFERENCE_ANGLE, causing a collision. This CL re-allocates the enum. Bug: angleproject:6105 Change-Id: I0da95dbd307954e2f7f5107d0179d580ec536f2b Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3219591 Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Tim Van Patten <timvp@google.com> Commit-Queue: Jonah Ryan-Davis <jonahr@google.com>