Bug 1751259 - make marionette really use fission. r=whimboo,webdriver-reviewers

Differential Revision: https://phabricator.services.mozilla.com/D144342

browser/components/sessionstore/test/marionette/manifest.ini

@@ -5,4 +5,4 @@ tags = local
 [test_restore_windows_after_windows_shutdown.py]
 skip-if =
   os != "win"
-  win10_2004 && !debug && !asan # Bug 1727691
+  win10_2004  # Bug 1727691

testing/marionette/harness/marionette_harness/runner/base.py

@@ -421,13 +421,6 @@ class BaseMarionetteArguments(ArgumentParser):
             help="Enable python post-mortem debugger when a test fails."
             " Pass in the debugger you want to use, eg pdb or ipdb.",
         )
-        self.add_argument(
-            "--enable-fission",
-            action="store_true",
-            dest="enable_fission",
-            default=False,
-            help="Enable Fission (site isolation) in Gecko.",
-        )
         self.add_argument(
             "-z",
             "--headless",
@@ -643,7 +636,6 @@ class BaseMarionetteTestRunner(object):
         verbose=0,
         emulator=False,
         headless=False,
-        enable_fission=False,
         **kwargs
     ):
         self._appName = None
@@ -688,20 +680,6 @@ class BaseMarionetteTestRunner(object):
         self.verbose = verbose
         self.headless = headless
 
-        self.enable_fission = enable_fission
-        if self.enable_fission:
-            self.prefs.update(
-                {
-                    "fission.autostart": True,
-                }
-            )
-        else:
-            self.prefs.update(
-                {
-                    "fission.autostart": False,
-                }
-            )
-
         # If no repeat has been set, default to 30 extra runs
         if self.run_until_failure and repeat is None:
             self.repeat = 30

testing/marionette/harness/marionette_harness/tests/unit/unit-tests.ini

@@ -102,7 +102,9 @@ skip-if = asan || manage_instance == false
 [test_localization.py]
 
 [test_reftest.py]
-skip-if = os == 'mac' # bug 1674411
+skip-if =
+  os == 'mac' # bug 1674411
+  os == "linux" && asan && fission  # bug 1727207
 
 [test_sendkeys_menupopup_chrome.py]