angle: Fix chrome/win-on-linux build after https://chromium-review.googlesource.com/466106.
angle: Fix chrome/win-on-linux build after https://chromium-review.googlesource.com/466106.

Bug: 495204
Change-Id: I6d460a9e6d110be4697e3cc1685e16395276dd42
Reviewed-on: https://chromium-review.googlesource.com/600258
Reviewed-by: Jamie Madill <7e492b4f1c8458024932de3ba475cbf015424c30@chromium.org>

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