PM: Enable service worker relationships by default.

Bug: 1143281
Change-Id: I5107ca4d324248456470f5880429d10760d77076
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2557223Reviewed-by: Patrick Monette <pmonette@chromium.org>
Commit-Queue: Sigurður Ásgeirsson <siggi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#830661}

components/performance_manager/features.cc

@@ -47,7 +47,7 @@ TabLoadingFrameNavigationThrottlesParams::GetParams() {
 }
 
 const base::Feature kServiceWorkerRelationshipsInGraph{
-    "ServiceWorkerRelationshipsInGraph", base::FEATURE_DISABLED_BY_DEFAULT};
+    "ServiceWorkerRelationshipsInGraph", base::FEATURE_ENABLED_BY_DEFAULT};
 
 }  // namespace features
 }  // namespace performance_manager

components/performance_manager/worker_watcher_unittest.cc

@@ -1336,7 +1336,8 @@ void WorkerWatcherTest::TestFrameDestroyed(
     feature_list.InitAndEnableFeature(
         features::kServiceWorkerRelationshipsInGraph);
   } else {
-    feature_list.Init();
+    feature_list.InitAndDisableFeature(
+        features::kServiceWorkerRelationshipsInGraph);
   }
 
   int render_process_id = process_node_source()->CreateProcessNode();