Merge third_party/angle_dx11 from https://chromium.googlesource.com/external/angle.git at d34a0d1b17422f5b2ec497617f44b9c1877751d6

This commit was generated by merge_from_chromium.py.

Change-Id: I7370e431d68a7ce908bf8ef6f4ed51be69c9e0a1