Merge third_party/angle_dx11 from https://chromium.googlesource.com/external/angle.git at 9b344317b2ced9123da6e0e55aeb75e8abca84c5

This commit was generated by merge_from_chromium.py.

Change-Id: I11de8c677afcdd25cc28ae4f445e6d76f009646c