Update webg2l conformence test expectations.

There is still flake in webgl2_conformance_gl_passthrough_tests on
Windows Intel GPU FYI bots. Use a bigger hammer and mark all of
deqp/functional/gles3/textureshadow/cube_* flaky.

Bug: 963450
Change-Id: I0c1e305e591b6acbcc3768418dcad799c3f4eb99
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1617065Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: kylechar <kylechar@chromium.org>
Cr-Commit-Position: refs/heads/master@{#660837}

content/test/gpu/gpu_tests/test_expectations/webgl2_conformance_expectations.txt

@@ -261,16 +261,7 @@ crbug.com/602688 [ opengl win passthrough intel ] conformance2/glsl3/vector-dyna
 crbug.com/602688 [ opengl win passthrough intel ] conformance2/glsl3/vector-dynamic-indexing.html [ Failure ]
 crbug.com/angleproject/2880 [ opengl win passthrough intel ] deqp/functional/gles3/shaderbuiltinvar.html [ Failure ]
 crbug.com/957631 [ opengl win passthrough intel ] conformance2/rendering/element-index-uint.html [ Failure ]
-crbug.com/963450 [ opengl win passthrough intel ] deqp/functional/gles3/textureshadow/cube_linear_greater.html [ RetryOnFailure ]
-crbug.com/963450 [ opengl win passthrough intel ] deqp/functional/gles3/textureshadow/cube_linear_mipmap_linear_less.html [ RetryOnFailure ]
-crbug.com/963450 [ opengl win passthrough intel ] deqp/functional/gles3/textureshadow/cube_linear_mipmap_nearest_greater_or_equal.html [ RetryOnFailure ]
-crbug.com/963450 [ opengl win passthrough intel ] deqp/functional/gles3/textureshadow/cube_linear_mipmap_nearest_not_equal.html [ RetryOnFailure ]
-crbug.com/963450 [ opengl win passthrough intel ] deqp/functional/gles3/textureshadow/cube_linear_not_equal.html [ RetryOnFailure ]
-crbug.com/963450 [ opengl win passthrough intel ] deqp/functional/gles3/textureshadow/cube_nearest_greater_or_equal.html [ RetryOnFailure ]
-crbug.com/963450 [ opengl win passthrough intel ] deqp/functional/gles3/textureshadow/cube_nearest_greater.html [ RetryOnFailure ]
-crbug.com/963450 [ opengl win passthrough intel ] deqp/functional/gles3/textureshadow/cube_nearest_mipmap_linear_less.html [ RetryOnFailure ]
-crbug.com/963450 [ opengl win passthrough intel ] deqp/functional/gles3/textureshadow/cube_nearest_mipmap_linear_not_equal.html [ RetryOnFailure ]
-crbug.com/963450 [ opengl win passthrough intel ] deqp/functional/gles3/textureshadow/cube_nearest_mipmap_nearest_less_or_equal.html [ RetryOnFailure ]
+crbug.com/963450 [ opengl win passthrough intel ] deqp/functional/gles3/textureshadow/cube_* [ RetryOnFailure ]
 
 # Passthrough command decoder / Linux / OpenGL / NVIDIA
 crbug.com/773861 [ opengl linux passthrough nvidia ] conformance/textures/image_bitmap_from_video/tex-2d-luminance_alpha-luminance_alpha-unsigned_byte.html [ Failure ]