Create separate SchedulerFeatureFlags instead of using ReactFeatureFlags (#14455)

packages/scheduler/forks/SchedulerFeatureFlags.www.js

@@ -0,0 +1,9 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ */
+
+export const enableSchedulerDebugging = true;

packages/scheduler/src/Scheduler.js

@@ -8,7 +8,7 @@
 
 /* eslint-disable no-var */
 
-import {enableSchedulerDebugging} from 'shared/ReactFeatureFlags';
+import {enableSchedulerDebugging} from './SchedulerFeatureFlags';
 
 // TODO: Use symbols?
 var ImmediatePriority = 1;

packages/scheduler/src/SchedulerFeatureFlags.js

@@ -0,0 +1,9 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ */
+
+export const enableSchedulerDebugging = false;

scripts/rollup/forks.js

@@ -157,6 +157,18 @@ const forks = Object.freeze({
     }
   },
 
+  'scheduler/src/SchedulerFeatureFlags': (bundleType, entry, dependencies) => {
+    if (
+      entry === 'scheduler' &&
+      (bundleType === FB_WWW_DEV ||
+        bundleType === FB_WWW_PROD ||
+        bundleType === FB_WWW_PROFILING)
+    ) {
+      return 'scheduler/forks/SchedulerFeatureFlags.www.js';
+    }
+    return 'scheduler/src/SchedulerFeatureFlags';
+  },
+
   // This logic is forked on www to fork the formatting function.
   'shared/invariant': (bundleType, entry) => {
     switch (bundleType) {