Fixing ANGLE Bugs

Before you commit a WebKit patch that modifies ANGLE, please run Tools/Scripts/update-angle --regenerate-changes-diff. This will update ​Source/ThirdParty/ANGLE/changes.diff so that people can see the diff from upstream at a glance.

When fixing bugs in ANGLE, please create a new bug on ​Monorail (Google's bug tracker) and attach the patch applied to WebKit so that changes can eventually be merged upstream instead of maintained locally.

Merging ANGLE from Upstream

To pull in a new revision of ANGLE, run the script ​Tools/Scripts/update-angle and follow its instructions. This script will attempt to update to a new version of ANGLE without losing WebKit's local changes by performing a git rebase. It also helps updating the CMake build files and ANGLE.plist.