Revert "cop: Disable oss-fuzz coverage builds"

This reverts commit 9f1d74f.

Reason for revert: Green again https://crbug.com/oss-fuzz/64742#c1

Original change's description:
> cop: Disable oss-fuzz coverage builds
>
> BUG=b:314697420
> TEST=cop
> TEST=devtools/copgen.sh
>
> Change-Id: I8ecf63e9f93fe664479aff5f7377665eac0cf5e3
> Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/adhd/+/5082326
> Tested-by: chromeos-cop-builder@chromeos-cop.iam.gserviceaccount.com <chromeos-cop-builder@chromeos-cop.iam.gserviceaccount.com>
> Tested-by: Li-Yu Yu <aaronyu@google.com>
> Reviewed-by: Chih-Yang Hsia <paulhsia@chromium.org>
> Commit-Queue: Li-Yu Yu <aaronyu@google.com>

BUG=b:314697420

Change-Id: I8132b4e4bae65dadba8c70f8e17c1498a729b92f
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/adhd/+/5107819
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Tested-by: chromeos-cop-builder@chromeos-cop.iam.gserviceaccount.com <chromeos-cop-builder@chromeos-cop.iam.gserviceaccount.com>
Commit-Queue: Li-Yu Yu <aaronyu@google.com>

.cop/build.yaml

@@ -670,6 +670,53 @@
         "oss-fuzz-undefined:1"
       ],
       "entrypoint": "python3"
+    },
+    {
+      "name": "gcr.io/${PROJECT_ID}/adhd-archlinux-builder",
+      "args": [
+        "-ah",
+        "oss-fuzz-setup/",
+        "oss-fuzz-coverage/"
+      ],
+      "id": "oss-fuzz-coverage:0",
+      "waitFor": [
+        "oss-fuzz-setup:3"
+      ],
+      "entrypoint": "rsync"
+    },
+    {
+      "name": "gcr.io/cloud-builders/docker",
+      "args": [
+        "oss-fuzz/infra/helper.py",
+        "build_fuzzers",
+        "--sanitizer",
+        "coverage",
+        "--engine",
+        "libfuzzer",
+        "cras",
+        "/workspace/oss-fuzz-coverage/adhd"
+      ],
+      "dir": "oss-fuzz-coverage",
+      "id": "oss-fuzz-coverage:1",
+      "waitFor": [
+        "oss-fuzz-coverage:0"
+      ],
+      "entrypoint": "python3"
+    },
+    {
+      "name": "gcr.io/google.com/cloudsdktool/cloud-sdk",
+      "args": [
+        "oss-fuzz/infra/helper.py",
+        "coverage",
+        "cras",
+        "--port="
+      ],
+      "dir": "oss-fuzz-coverage",
+      "id": "oss-fuzz-coverage:2",
+      "waitFor": [
+        "oss-fuzz-coverage:1"
+      ],
+      "entrypoint": "python3"
     }
   ],
   "timeout": "1200s",

devtools/quick-verifier/build/build_steps.go

@@ -34,8 +34,7 @@ func makeBuild(gitSteps *buildplan.Sequence, tags []string) *cloudbuildpb.Build
 	b.Add(ossFuzzSteps("oss-fuzz-address-afl", "address", "afl").WithDep(ossFuzzSetup))
 	b.Add(ossFuzzSteps("oss-fuzz-memory", "memory", "libfuzzer").WithDep(ossFuzzSetup))
 	b.Add(ossFuzzSteps("oss-fuzz-undefined", "undefined", "libfuzzer").WithDep(ossFuzzSetup))
-	// TODO(b/314697420): Re-enable when fixed.
-	// b.Add(ossFuzzSteps("oss-fuzz-coverage", "coverage", "libfuzzer").WithDep(ossFuzzSetup))
+	b.Add(ossFuzzSteps("oss-fuzz-coverage", "coverage", "libfuzzer").WithDep(ossFuzzSetup))
 
 	return &cloudbuildpb.Build{
 		Steps: b.AsCloudBuild(),