Suppress flaky webgl test on win nvidia

Set conformance/glsl/misc/fragcolor-fragdata-invariant.html to RetryOnFailure

TBR=kbr@chromium.org

Bug: 1079245
Change-Id: I606f0fede5f2c2c86d1f7302385e7e2a1782a852
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2188555Reviewed-by: Shrek Shao <shrekshao@google.com>
Commit-Queue: Shrek Shao <shrekshao@google.com>
Cr-Commit-Position: refs/heads/master@{#766564}

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

@@ -155,6 +155,7 @@ crbug.com/angleproject/3033 [ win no-passthrough ] conformance2/textures/misc/ge
 crbug.com/angleproject/1465 [ win no-use-gl ] conformance2/glsl3/tricky-loop-conditions.html [ Failure ]
 
 # Win / NVidia
+crbug.com/1079245 [ win nvidia ] conformance/glsl/misc/fragcolor-fragdata-invariant.html [ RetryOnFailure ]
 crbug.com/631317 [ d3d11 win nvidia ] deqp/functional/gles3/fbomultisample* [ RetryOnFailure ]
 crbug.com/679639 [ d3d11 win nvidia ] conformance2/rendering/draw-with-integer-texture-base-level.html [ Failure ]
 # Flake seen once.

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

@@ -167,6 +167,7 @@ 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/1079245 [ win nvidia ] conformance/glsl/misc/fragcolor-fragdata-invariant.html [ RetryOnFailure ]
 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 ]