Suppress more flaky WebGL Vulkan tests.

conformance/ogles/GL/struct/struct_009_to_016.html
conformance/ogles/GL/struct/struct_017_to_024.html
conformance/ogles/GL/struct/struct_025_to_032.html

Tbr: kbr@chromium.org
Bug: 1017162
Change-Id: I4f65aaf85b051f6aa7c1704671a20771f45b9c28
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1903806Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Cr-Commit-Position: refs/heads/master@{#713415}

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

@@ -282,6 +282,9 @@ crbug.com/1017162 [ win nvidia vulkan passthrough ] conformance/ogles/GL/smooths
 crbug.com/1017162 [ win nvidia vulkan passthrough ] conformance/ogles/GL/sqrt/sqrt_001_to_006.html [ Failure ]
 crbug.com/1017162 [ win nvidia vulkan passthrough ] conformance/ogles/GL/step/step_001_to_006.html [ Failure ]
 crbug.com/1017162 [ win nvidia vulkan passthrough ] conformance/ogles/GL/struct/struct_001_to_008.html [ Failure ]
+crbug.com/1017162 [ win nvidia vulkan passthrough ] conformance/ogles/GL/struct/struct_009_to_016.html [ Failure ]
+crbug.com/1017162 [ win nvidia vulkan passthrough ] conformance/ogles/GL/struct/struct_017_to_024.html [ Failure ]
+crbug.com/1017162 [ win nvidia vulkan passthrough ] conformance/ogles/GL/struct/struct_025_to_032.html [ Failure ]
 
 # Vulkan / Win / AMD / Passthrough command decoder
 crbug.com/angleproject/2898 [ win amd vulkan passthrough ] conformance/extensions/oes-texture-float-with-canvas.html [ Failure ]