Stop suppressing two WebGL-related context loss tests on macOS.

  ContextLost_WebGLBlockedAfterJSNavigation
  ContextLost_WebGLUnblockedAfterUserInitiatedReload

Were both flaking due to the same root cause. We believe that has now been fixed.

TBR=kbr@chromium.org

Bug: 900948
Change-Id: I50598872ba8965a047badb69862defebb49fdaee
Reviewed-on: https://chromium-review.googlesource.com/c/1423114
Reviewed-by: Jonathan Ross <jonross@chromium.org>
Commit-Queue: Jonathan Ross <jonross@chromium.org>
Cr-Commit-Position: refs/heads/master@{#624427}
1 file changed