Sheriff: Disable BrowserMinidumpTest tests on ChromeOS

Tests are currently failing on chromeos-betty-chrome. I'm not sure how to
just disable the tests on the bot, so I'm disabling generally on chromeos.

Bug: 1038043
Change-Id: I2ae30a98157164889fb6acb305409091028bdf3b
Tbr: achuith@chromium.org
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1981261Reviewed-by: Adithya Srinivasan <adithyas@chromium.org>
Reviewed-by: Achuith Bhandarkar <achuith@chromium.org>
Commit-Queue: Adithya Srinivasan <adithyas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#727569}

tools/perf/core/minidump_unittest.py

@@ -18,7 +18,8 @@ class BrowserMinidumpTest(tab_test_case.TabTestCase):
   @decorators.Isolated
   # Minidump symbolization doesn't work in ChromeOS local mode if the rootfs is
   # still read-only, so skip the test in that case.
-  @decorators.Disabled('chromeos-local')
+  # TODO(crbug.com/1038043): Test is failing on chromeos-betty-chrome.
+  @decorators.Disabled('chromeos-local', 'chromeos')
   def testSymbolizeMinidump(self):
     # Wait for the browser to restart fully before crashing
     self._LoadPageThenWait('var sam = "car";', 'sam')
@@ -58,7 +59,8 @@ class BrowserMinidumpTest(tab_test_case.TabTestCase):
   @decorators.Isolated
   # Minidump symbolization doesn't work in ChromeOS local mode if the rootfs is
   # still read-only, so skip the test in that case.
-  @decorators.Disabled('chromeos-local')
+  # TODO(crbug.com/1038043): Test is failing on chromeos-betty-chrome.
+  @decorators.Disabled('chromeos-local', 'chromeos')
   def testMultipleCrashMinidumps(self):
     # Wait for the browser to restart fully before crashing
     self._LoadPageThenWait('var cat = "dog";', 'cat')