Re-enable angle_white_box_tests on TSAN.

This was most likely fixed along with several changes that went
into fixing angle_end2end_tests on TSAN.

Bug: chromium:1035461
Change-Id: I5de352a9f1d00226ccf5c00b220689082c475ea9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2517643
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>
Auto-Submit: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#823685}

testing/buildbot/chromium.gpu.fyi.json

@@ -9668,6 +9668,31 @@
         "test_id_prefix": "ninja://third_party/angle/src/tests:angle_unittests/",
         "use_isolated_scripts_api": true
       },
+      {
+        "args": [
+          "angle_white_box_tests",
+          "--bot-mode"
+        ],
+        "merge": {
+          "args": [],
+          "script": "//testing/merge_scripts/standard_isolated_script_merge.py"
+        },
+        "swarming": {
+          "can_use_on_swarming_builders": true,
+          "containment_type": "AUTO",
+          "dimension_sets": [
+            {
+              "gpu": "10de:1cb3-418.56",
+              "os": "Ubuntu-19.04",
+              "pool": "chromium.tests.gpu"
+            }
+          ],
+          "service_account": "chromium-tester@chops-service-accounts.iam.gserviceaccount.com"
+        },
+        "test": "angle_white_box_tests",
+        "test_id_prefix": "ninja://third_party/angle/src/tests:angle_white_box_tests/",
+        "use_isolated_scripts_api": true
+      },
       {
         "args": [
           "--use-cmd-decoder=passthrough",

testing/buildbot/test_suite_exceptions.pyl

@@ -107,8 +107,6 @@
     'remove_from': [
       # https://crbug.com/1035178
       'Win10 FYI x64 Release (AMD RX 550)',
-      # https://crbug.com/1035461
-      'Linux FYI GPU TSAN Release',
       # https://crbug.com/1094629
       'Linux FYI Release (AMD R7 240)',
     ],