[bfcache] Fix ServiceWorkerVersion::OnControlleeDestroyed

This CL fixes a bug where RemoveControllee can be called twice in

ServiceWorkerVersion: :OnControlleeDestroyed.
Change-Id: I7ea604f09a36e6bf1b63d45bee9623ba13d8e555
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1900795Reviewed-by: Matt Falkenhagen <falken@chromium.org>
Commit-Queue: Yuzu Saijo <yuzus@chromium.org>
Cr-Commit-Position: refs/heads/master@{#712952}

content/browser/service_worker/service_worker_version.cc

@@ -788,18 +788,19 @@ void ServiceWorkerVersion::RemoveControlleeFromBackForwardCacheMap(
 void ServiceWorkerVersion::OnControlleeDestroyed(
     const std::string& client_uuid) {
   if (!IsBackForwardCacheEnabled() ||
-      !ServiceWorkerContext::IsServiceWorkerOnUIEnabled())
+      !ServiceWorkerContext::IsServiceWorkerOnUIEnabled()) {
     RemoveControllee(client_uuid);
-
+  } else {
     if (base::Contains(controllee_map_, client_uuid)) {
       RemoveControllee(client_uuid);
     } else if (base::Contains(bfcached_controllee_map_, client_uuid)) {
       RemoveControlleeFromBackForwardCacheMap(client_uuid);
     }
-  // It is possible that the controllee belongs to neither |controllee_map_| or
-  // |bfcached_controllee_map_|. This happens when a BackForwardCached
+    // It is possible that the controllee belongs to neither |controllee_map_|
+    // or |bfcached_controllee_map_|. This happens when a BackForwardCached
     // controllee is deleted after eviction, which has already removed it from
     // |bfcached_controllee_map_|.
+  }
 }
 
 void ServiceWorkerVersion::EvictBackForwardCachedControllees() {