Reenable fast/hidpi/image-srcset-relative-svg-canvas{,-2x}.html

Hopefully these tests are no longer flaky, but as a cautionary step,
mark them as Pass/Fail for now and keep an eye on them.

TBR=schenney@chromium.org

Bug: 306222
Change-Id: Ia0e87564e2113dfaa50cd723654786805026924d
Reviewed-on: https://chromium-review.googlesource.com/c/1322789Reviewed-by: Fredrik Söderquist <fs@opera.com>
Commit-Queue: Fredrik Söderquist <fs@opera.com>
Cr-Commit-Position: refs/heads/master@{#606010}

third_party/WebKit/LayoutTests/TestExpectations

@@ -2268,8 +2268,8 @@ crbug.com/555703 [ Linux Mac Win Fuchsia ] virtual/media-gpu-accelerated [ Skip
 
 crbug.com/613887 http/tests/preload/meta-viewport-link-headers.html [ Failure Pass ]
 
-crbug.com/306222 fast/hidpi/image-srcset-relative-svg-canvas.html [ Skip ]
-crbug.com/306222 fast/hidpi/image-srcset-relative-svg-canvas-2x.html [ Skip ]
+crbug.com/306222 fast/hidpi/image-srcset-relative-svg-canvas.html [ Failure Pass ]
+crbug.com/306222 fast/hidpi/image-srcset-relative-svg-canvas-2x.html [ Failure Pass ]
 
 crbug.com/467477 fast/multicol/vertical-rl/nested-columns.html [ Failure ]