Suppress Flaky WebGL2 Conformance Failures

Some tests withing webgl2_conformance_gl_passthrough_tests are flaky
on ARM-based Mac DTKs. This change marks them to RetryOnFailure

TEST=webgl2_conformance_gl_passthrough_tests
Bug: 1130119

Change-Id: I1ee39cbea8d1984a93b4cc1702b54ed06c0e1331
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2485297Reviewed-by: Brian Sheedy <bsheedy@chromium.org>
Reviewed-by: Jonathan Ross <jonross@chromium.org>
Commit-Queue: Jonathan Ross <jonross@chromium.org>
Cr-Commit-Position: refs/heads/master@{#818649}

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

@@ -755,11 +755,15 @@ crbug.com/1130118 [ mac apple-apple-a12z ] deqp/functional/gles3/framebufferblit
 crbug.com/1130118 [ mac apple-apple-a12z ] deqp/functional/gles3/framebufferblit/default_framebuffer_00.html [ Failure ]
 crbug.com/1130119 [ mac apple-apple-a12z ] conformance2/glsl3/vector-dynamic-indexing.html [ Failure ]
 crbug.com/1130119 [ mac apple-apple-a12z ] conformance2/textures/misc/tex-base-level-bug.html [ Failure ]
+crbug.com/1130119 [ mac apple-apple-a12z ] conformance2/textures/webgl_canvas/tex-3d-r32f-red-float.html [ RetryOnFailure ]
 crbug.com/1130119 [ mac apple-apple-a12z ] conformance2/rendering/framebuffer-completeness-unaffected.html [ Failure ]
 crbug.com/1130119 [ mac apple-apple-a12z passthrough angle-opengl ] conformance2/rendering/framebuffer-render-to-layer.html [ Failure ]
 crbug.com/1130119 [ mac apple-apple-a12z ] deqp/functional/gles3/fbocompleteness.html [ Failure ]
 crbug.com/1130119 [ mac apple-apple-a12z ] deqp/functional/gles3/fbodepthbuffer.html [ Failure ]
 crbug.com/1130119 [ mac apple-apple-a12z ] deqp/functional/gles3/shadertexturefunction/texturegrad.html [ Failure ]
+crbug.com/1130119 [ mac apple-apple-a12z ] deqp/functional/gles3/textureshadow/cube_linear_mipmap_linear_greater.html [ RetryOnFailure ]
+crbug.com/1130119 [ mac apple-apple-a12z ] deqp/functional/gles3/textureshadow/cube_linear_mipmap_linear_less.html [ RetryOnFailure ]
+crbug.com/1130119 [ mac apple-apple-a12z ] deqp/functional/gles3/texturespecification/texstorage2d_format_size.html [ RetryOnFailure ]
 crbug.com/1130703 [ mac apple-apple-a12z no-passthrough ] conformance/textures/misc/texture-copying-and-deletion.html [ Failure ]
 crbug.com/1130703 [ mac apple-apple-a12z no-passthrough ] conformance/textures/misc/texture-copying-feedback-loops.html [ Failure ]
 crbug.com/1130708 [ mac apple-apple-a12z no-passthrough ] conformance2/textures/canvas/tex-2d-rgb5_a1-rgba-unsigned_byte.html [ Failure ]