Revert "Disable a set of DumpAccessibilityTree tests"

This reverts commit 87336cbd.

Reason for revert: CL used for merge-only, not needed on Master.

Original change's description:
> Disable a set of DumpAccessibilityTree tests
>
> Disables a set of tests that are failing on M87 on Android.
>
> We plan to land on Master, merge into M87, revert on Master (since it
> has been addressed on Master).
>
> BUG=1137967
>
> Change-Id: I6f38149b21df33d1354394322b7bad9ff492dad9
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2481629
> Commit-Queue: Dominic Mazzoni <dmazzoni@chromium.org>
> Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#818691}

TBR=dmazzoni@chromium.org,donnd@chromium.org,mschillaci@google.com

Change-Id: Ic68d8d8981c4e332ad331d1e554bc28c9efe8156
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1137967
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2488341Reviewed-by: Donn Denman <donnd@chromium.org>
Commit-Queue: Donn Denman <donnd@chromium.org>
Cr-Commit-Position: refs/heads/master@{#819081}

content/browser/accessibility/dump_accessibility_tree_browsertest.cc

@@ -554,40 +554,6 @@ IN_PROC_BROWSER_TEST_P(DumpAccessibilityTreeTest,
 #define MAYBE_AccessibilityAriaCombobox AccessibilityAriaCombobox
 #endif
 
-// DISABLE A BUNCH OF TESTS FOR ANDROID
-// ------------------------------------
-// TODO(crbug.com/1137967): tests are flaky on android.
-#if defined(OS_ANDROID)
-#define MAYBE_AccessibilityAriaMenuItemRadio \
-  DISABLED_AccessibilityAriaMenuItemRadio
-#define MAYBE_AccessibilityAriaComboboxUneditable \
-  DISABLED_AccessibilityAriaComboboxUneditable
-#define MAYBE_AccessibilityAriaListBox DISABLED_AccessibilityAriaListBox
-#define MAYBE_AccessibilityAriaListBoxDisabled \
-  DISABLED_AccessibilityAriaListBoxDisabled
-#define MAYBE_AccessibilityAriaOption DISABLED_AccessibilityAriaOption
-#define MAYBE_AccessibilityAriaPosinset DISABLED_AccessibilityAriaPosinset
-#define MAYBE_AccessibilityAriaSelected DISABLED_AccessibilityAriaSelected
-#define MAYBE_AccessibilityAriaSetsize DISABLED_AccessibilityAriaSetsize
-#define MAYBE_AccessibilityAriaTree DISABLED_AccessibilityAriaTree
-#define MAYBE_AccessibilityButtonWithListboxPopup \
-  DISABLED_AccessibilityButtonWithListboxPopup
-#else
-#define MAYBE_AccessibilityAriaMenuItemRadio AccessibilityAriaMenuItemRadio
-#define MAYBE_AccessibilityAriaComboboxUneditable \
-  AccessibilityAriaComboboxUneditable
-#define MAYBE_AccessibilityAriaListBox AccessibilityAriaListBox
-#define MAYBE_AccessibilityAriaListBoxDisabled AccessibilityAriaListBoxDisabled
-#define MAYBE_AccessibilityAriaOption AccessibilityAriaOption
-#define MAYBE_AccessibilityAriaPosinset AccessibilityAriaPosinset
-#define MAYBE_AccessibilityAriaSelected AccessibilityAriaSelected
-#define MAYBE_AccessibilityAriaSetsize AccessibilityAriaSetsize
-#define MAYBE_AccessibilityAriaTree AccessibilityAriaTree
-#define MAYBE_AccessibilityButtonWithListboxPopup \
-  AccessibilityButtonWithListboxPopup
-#endif
-// ------------------------------------
-
 IN_PROC_BROWSER_TEST_P(DumpAccessibilityTreeTest,
                        MAYBE_AccessibilityAriaCombobox) {
   RunAriaTest(FILE_PATH_LITERAL("aria-combobox.html"));