Fixing issue with ChromeOS test and reenabling the test

There was a missing part of an if cause allowing passthrough to be tried
as a Canvas Resource Provider.
Re adding that check, and removing the expectation of the test to fail.

This CL fixes as well https://buganizer.corp.google.com/issues/158138519

Bug: 1088023
Change-Id: Ic896d0d0b6cdbc72a0751daf0b2e629a0febdf18
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2230764Reviewed-by: Fernando Serboncini <fserb@chromium.org>
Reviewed-by: Brian Sheedy <bsheedy@chromium.org>
Commit-Queue: Juanmi Huertas <juanmihd@chromium.org>
Cr-Commit-Position: refs/heads/master@{#775226}

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

@@ -331,6 +331,3 @@ crbug.com/1086687 [ chromeos chromeos-board-kevin ] Pixel_PrecisionRoundedCorner
 
 # Produces blank images on gpu-fyi-try-chromeos-kevin, gpu-fyi-try-chromeos-amd64-generic.
 crbug.com/1086690 [ chromeos ] Pixel_WebGLSadCanvas [ Skip ]
-
-# Started producing black instead of green on kevin devices
-crbug.com/1088023 [ chromeos chromeos-board-kevin ] Pixel_CanvasLowLatencyWebGL [ Failure ]

third_party/blink/renderer/core/html/canvas/canvas_rendering_context_host.cc

@@ -122,7 +122,10 @@ void CanvasRenderingContextHost::CreateCanvasResourceProvider3D(
     // If LowLatency is enabled, we need a resource that is able to perform well
     // in such mode. It will first try a PassThrough provider and, if that is
     // not possible, it will try a SharedImage with the appropriate flags.
-    if (RenderingContext() && RenderingContext()->UsingSwapChain()) {
+    if ((RenderingContext() && RenderingContext()->UsingSwapChain()) ||
+        RuntimeEnabledFeatures::WebGLImageChromiumEnabled()) {
+      // If either SwapChain is enabled or WebGLImage mode is enabled, we can
+      // try a passthrough provider.
       DCHECK(LowLatencyEnabled());
       provider = CanvasResourceProvider::CreatePassThroughProvider(
           Size(), SharedGpuContext::ContextProviderWrapper(), FilterQuality(),