Enable cc_unittests for tsan bot now that they pass.

testing/buildbot/chromium.memory.json

Index: testing/buildbot/chromium.memory.json
diff --git a/testing/buildbot/chromium.memory.json b/testing/buildbot/chromium.memory.json
index 37e1810c19e627519ca1334dcf1a6a5515a44b4e..7aafc7decaadff519f8bc157542d8e372148a0fe 100644
--- a/testing/buildbot/chromium.memory.json
+++ b/testing/buildbot/chromium.memory.json
@@ -594,7 +594,6 @@
   "Linux TSan Tests": {
     "disabled_tests": {
       "browser_tests": "Too many errors, clean content_browsertests first. http://crbug.com/368525",
-      "cc_unittests": "http://crbug.com/437454",
       "interactive_ui_tests": "http://crbug.com/455679"
     },
     "gtest_tests": [
@@ -638,6 +637,12 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
+        "test": "cc_unittests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "chromedriver_unittests"
       },
       {