Backed out changeset d9cf7d539c45 (bug 1549619) for turning Bug1443043 into permafail

taskcluster/ci/test/mochitest.yml

@@ -222,10 +222,11 @@ mochitest-devtools-chrome:
             default: 5400
     chunks:
         by-test-platform:
-            .*-ccov/debug: 16
-            linux64/debug: 12
-            .*-asan/opt: 8
-            default: 5
+            linux64/debug: 16
+            linux64-ccov/debug: 16
+            windows10-64-ccov/debug: 10
+            macosx64-ccov/debug: 15
+            default: 8
     mozharness:
         mochitest-flavor: chrome
         chunked: true