mac: Disable content_shell_crash_test on 10.10 and 10.11 bots.

This test needs otool, and otool needs 10.14+ to run after the recent
Xcode bump.

We still run the test elsewhere, so not running it on the older bots
seems fine -- the test isn't very OS-version-dependent.

Bug: 1138050
Change-Id: I37c085fcf5c2850b42a21792fdcb28c9930005a5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2471798
Commit-Queue: Nico Weber <thakis@chromium.org>
Commit-Queue: Mark Mentovai <mark@chromium.org>
Auto-Submit: Nico Weber <thakis@chromium.org>
Reviewed-by: Mark Mentovai <mark@chromium.org>
Cr-Commit-Position: refs/heads/master@{#817110}

testing/buildbot/chromium.mac.json

@@ -1534,28 +1534,6 @@
         },
         "test_id_prefix": "ninja://components:components_perftests/"
       },
-      {
-        "isolate_name": "content_shell_crash_test",
-        "merge": {
-          "args": [],
-          "script": "//testing/merge_scripts/standard_isolated_script_merge.py"
-        },
-        "name": "content_shell_crash_test",
-        "resultdb": {
-          "enable": false
-        },
-        "swarming": {
-          "can_use_on_swarming_builders": true,
-          "dimension_sets": [
-            {
-              "gpu": "none",
-              "os": "Mac-10.10"
-            }
-          ],
-          "service_account": "chromium-tester@chops-service-accounts.iam.gserviceaccount.com"
-        },
-        "test_id_prefix": "ninja://content/shell:content_shell_crash_test/"
-      },
       {
         "isolate_name": "extension_docserver_python_unittests",
         "merge": {
@@ -3260,28 +3238,6 @@
         },
         "test_id_prefix": "ninja://components:components_perftests/"
       },
-      {
-        "isolate_name": "content_shell_crash_test",
-        "merge": {
-          "args": [],
-          "script": "//testing/merge_scripts/standard_isolated_script_merge.py"
-        },
-        "name": "content_shell_crash_test",
-        "resultdb": {
-          "enable": false
-        },
-        "swarming": {
-          "can_use_on_swarming_builders": true,
-          "dimension_sets": [
-            {
-              "gpu": "none",
-              "os": "Mac-10.11"
-            }
-          ],
-          "service_account": "chromium-tester@chops-service-accounts.iam.gserviceaccount.com"
-        },
-        "test_id_prefix": "ninja://content/shell:content_shell_crash_test/"
-      },
       {
         "isolate_name": "extension_docserver_python_unittests",
         "merge": {

testing/buildbot/test_suite_exceptions.pyl

@@ -1069,6 +1069,8 @@
   },
   'content_shell_crash_test': {
     'remove_from': [
+      'Mac10.10 Tests',  # crbug.com/1138050
+      'Mac10.11 Tests',  # crbug.com/1138050
       'android-marshmallow-x86-rel-non-cq', # crbug.com/1084353
     ],
     'modifications': {