Lift suppression for passing WebGL tests on Mac SwANGLE.

Failures fixed by
https://chromium-review.googlesource.com/c/angle/angle/+/2390781

TBR=bsheedy

Bug: 1123524
Change-Id: I583adf0ac6117b8d4b5e7e03b3da12cea244e054
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2391617Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Reviewed-by: Brian Sheedy <bsheedy@chromium.org>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#804000}

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

@@ -794,13 +794,9 @@ crbug.com/1099978 [ mac swiftshader passthrough ] conformance/glsl/samplers/glsl
 crbug.com/1102991 [ mac swiftshader passthrough ] conformance/more/functions/copyTexSubImage2D.html [ RetryOnFailure ]
 crbug.com/1102991 [ mac swiftshader passthrough ] conformance/more/functions/deleteBufferBadArgs.html [ RetryOnFailure ]
 crbug.com/1102991 [ mac swiftshader passthrough ] conformance/more/glsl/uniformOutOfBounds.html [ RetryOnFailure ]
-crbug.com/1123524 [ mac swiftshader passthrough ] conformance/reading/read-pixels-pack-alignment.html [ Failure ]
 crbug.com/1099978 [ mac swiftshader passthrough ] conformance/reading/read-pixels-test.html [ Failure ]
 crbug.com/1099978 [ mac swiftshader passthrough ] conformance/renderbuffers/renderbuffer-initialization.html [ Failure ]
-crbug.com/1123524 [ mac swiftshader passthrough ] conformance/rendering/clear-after-copyTexImage2D.html [ Failure ]
 crbug.com/1099979 [ mac swiftshader passthrough ] conformance/rendering/draw-webgl-to-canvas-2d-repeatedly.html [ Failure ]
-crbug.com/1123524 [ mac swiftshader passthrough ] conformance/rendering/gl-viewport-test.html [ Failure ]
-crbug.com/1123524 [ mac swiftshader passthrough ] conformance/rendering/multisample-corruption.html [ Failure ]
 crbug.com/1099979 [ mac swiftshader passthrough ] conformance/textures/canvas/tex-2d-alpha-alpha-unsigned_byte.html [ Failure ]
 crbug.com/1099979 [ mac swiftshader passthrough ] conformance/textures/canvas/tex-2d-luminance_alpha-luminance_alpha-unsigned_byte.html [ Failure ]
 crbug.com/1099979 [ mac swiftshader passthrough ] conformance/textures/canvas/tex-2d-luminance-luminance-unsigned_byte.html [ Failure ]