Update suppression for oes-texture-half-float-with-video.html.

conformance/extensions/oes-texture-half-float-with-video.html is flaky
on Win10 x64 Debug NVIDIA and needs the "debug-x64" tag.

Bug: 1045339
Change-Id: I0f6068b11851fed28dfb185c52312c8ae0104c83
Tbr: ynovikov@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2096883Reviewed-by: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Kenneth Russell <kbr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#748871}

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

 # tags: [ android chromeos linux mac win win10 win7 ]
 # tags: [ android-chromium android-webview-instrumentation ]
-# tags: [ debug release ]
+# tags: [ debug debug-x64 release ]
 # tags: [ amd amd-0x6613 amd-0x699f amd-0x679e intel intel-0xa011 intel-0xa2e nvidia
 #         nvidia-0x1cb3 nvidia-0x2184 nvidia-0xfe9 qualcomm
 #         qualcomm-adreno-(tm)-330 qualcomm-adreno-(tm)-418
@@ -183,7 +183,7 @@ crbug.com/951628 [ win no-passthrough ] conformance/rendering/blending.html [ Fa
 # Win NVIDIA failures
 crbug.com/626524 [ win nvidia no-passthrough ] conformance/textures/misc/texture-npot-video.html [ RetryOnFailure ]
 crbug.com/630860 [ win nvidia ] conformance/textures/misc/texture-upload-size.html [ RetryOnFailure ]
-crbug.com/1045339 [ win10 debug nvidia ] conformance/extensions/oes-texture-half-float-with-video.html [ Skip ]
+crbug.com/1045339 [ win10 debug-x64 nvidia ] conformance/extensions/oes-texture-half-float-with-video.html [ Skip ]
 
 # crbug.com/679696 [ win nvidia no_passthrough ] conformance/extensions/ext-sRGB.html [ Failure ]