Disable Telemetry minidump tests on Linux

Disables BrowserMinidumpTest on Linux since there are unexpected crashes
occurring either in the test or in previous tests which are causing it
to fail.

TBR=crouleau@chromium.org

Bug: 1056235
Change-Id: I7d03de0f09df52c2ab6cb3f45809a71357500650
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2080080Reviewed-by: Brian Sheedy <bsheedy@chromium.org>
Commit-Queue: Brian Sheedy <bsheedy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#745692}

tools/perf/core/minidump_unittest.py

@@ -19,7 +19,8 @@ class BrowserMinidumpTest(tab_test_case.TabTestCase):
   # Minidump symbolization doesn't work in ChromeOS local mode if the rootfs is
   # still read-only, so skip the test in that case.
   # TODO(crbug.com/1038043): Test is failing on chromeos-betty-chrome.
-  @decorators.Disabled('chromeos-local', 'chromeos-board-betty')
+  # TODO(crbug.com/1056235): Re-enable on Linux once the crashes are fixed.
+  @decorators.Disabled('chromeos-local', 'chromeos-board-betty', 'linux')
   def testSymbolizeMinidump(self):
     # Wait for the browser to restart fully before crashing
     self._LoadPageThenWait('var sam = "car";', 'sam')
@@ -62,7 +63,8 @@ class BrowserMinidumpTest(tab_test_case.TabTestCase):
   # Minidump symbolization doesn't work in ChromeOS local mode if the rootfs is
   # still read-only, so skip the test in that case.
   # TODO(crbug.com/1038043): Test is failing on chromeos-betty-chrome.
-  @decorators.Disabled('chromeos-local', 'chromeos-board-betty')
+  # TODO(crbug.com/1056235): Re-enable on Linux once the crashes are fixed.
+  @decorators.Disabled('chromeos-local', 'chromeos-board-betty', 'linux')
   def testMultipleCrashMinidumps(self):
     # Wait for the browser to restart fully before crashing
     self._LoadPageThenWait('var cat = "dog";', 'cat')