Mark oes-texture-float-with-video flaky on Win10 / NVIDIA / D3D11 as well.

Occasionally uploading black frames from the video.

No-Try: True
Tbr: enga@chromium.org
Bug: 898674
Change-Id: I70f21ef767bdd2fd7e247f1ae5896c1660d652a2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2161777
Commit-Queue: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
Cr-Commit-Position: refs/heads/master@{#762115}

content/test/gpu/gpu_tests/test_expectations/webgl_conformance_expectations.txt

@@ -171,6 +171,9 @@ crbug.com/1045339 [ win10 debug-x64 nvidia ] conformance/extensions/oes-texture-
 
 # crbug.com/679696 [ win nvidia no_passthrough ] conformance/extensions/ext-sRGB.html [ Failure ]
 
+# Win10 / NVIDIA Quadro P400 / D3D11 failures
+crbug.com/898674 [ win10 nvidia-0x1cb3 d3d11 ] conformance/extensions/oes-texture-float-with-video.html [ RetryOnFailure ]
+
 # Win10 / NVIDIA Quadro P400 / D3D9 failures
 crbug.com/829389 [ win10 nvidia-0x1cb3 d3d9 ] conformance/canvas/canvas-test.html [ RetryOnFailure ]
 crbug.com/680754 [ win10 nvidia-0x1cb3 d3d9 ] conformance/canvas/drawingbuffer-static-canvas-test.html [ Failure ]