Re-enable DumpAccessibilityTreeTest.AccessibilityAriaValueMin and Max

Bug: 622387
Change-Id: I68252a1dbfa88eae8e5c4c7801dcbf9cf8f507fe
Tbr: aboxhall@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/938159
Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
Reviewed-by: Alice Boxhall <aboxhall@chromium.org>
Commit-Queue: Dominic Mazzoni <dmazzoni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#540088}
7 files changed